by BlastRoom
Adding probabilities and subtracting the overlap, and recognizing when there is none.
#probability_and_statistics

40 questions
One question set, multiple game modes. Tap any game to see it in action. Not sure which to pick?
Answer to place stones and capture territory.
Outrun the snow together.
Earn blasts, then hunt the other team.
Answer to earn energy, then climb.

The class blasts through walls together.
Bid on mystery lots. Most money wins.
Sell tours. Nice, standard, or a total scam.
Answer, restock, and serve the rush.
More correct answers pulls the rope your way.
Answer, then shoot down the alien wave.
Answer, then tap to leap the frozen ridge.
At a community clinic, 0.420 of patients get a flu shot, 0.250 get a blood-pressure check, and 0.110 get both. Find the probability that a patient gets a flu shot or a blood-pressure check, to three decimals.
In a school survey, 0.380 of students play a sport, 0.290 play an instrument, and 0.140 do both. What is the probability that a student plays a sport or an instrument, to three decimals?
On a farm, 0.460 of crates contain apples, 0.330 contain pears, and 0.180 contain both. What is the probability that a randomly chosen crate contains apples or pears, to three decimals?
At a library, 0.520 of visitors borrow a book, 0.210 use a study room, and 0.090 do both. Find the probability that a visitor borrows a book or uses a study room, to three decimals.
For a theater club, 0.350 of members act onstage, 0.410 help backstage, and 0.120 do both. What is the probability that a member acts onstage or helps backstage, to three decimals?
In a fitness center, 0.270 of members take yoga, 0.360 take cycling, and 0.080 take both. Find the probability that a member takes yoga or cycling, to three decimals.
At a school cafeteria, 0.440 of lunches include fruit, 0.310 include milk, and 0.200 include both. What is the probability that a lunch includes fruit or milk, to three decimals?
For a city park program, 0.190 of visitors rent a bike, 0.340 join a tour, and 0.070 do both. What is the probability that a visitor rents a bike or joins a tour, to three decimals?
In a hospital unit, 0.480 of patients receive physical therapy, 0.260 receive nutrition counseling, and 0.150 receive both. Find the probability that a patient receives physical therapy or nutrition counseling, to three decimals.
At a summer camp, 0.390 of campers choose canoeing, 0.280 choose archery, and 0.100 choose both. What is the probability that a camper chooses canoeing or archery, to three decimals?
For an online store, 0.230 of orders include a charger, 0.370 include headphones, and 0.090 include both. Find the probability that an order includes a charger or headphones, to three decimals.
In a school app, 0.560 of accounts have notifications on, 0.180 have dark mode on, and 0.130 have both. What is the probability that an account has notifications on or dark mode on, to three decimals?
Each smoothie order at a cafe is exactly one size: small 0.280, medium 0.450, large 0.220, or extra large 0.050. Find the probability that an order is small or large, to three decimals.
A school bus rider uses exactly one pass type: daily 0.180, weekly 0.320, monthly 0.410, or yearly 0.090. What is the probability a rider uses a weekly or monthly pass, to three decimals?
A greenhouse labels each plant as exactly one type: herb 0.260, vegetable 0.340, flower 0.300, or shrub 0.100. Find the probability a plant is an herb or a flower, to three decimals.
At a pet clinic, each appointment is exactly one visit type: wellness 0.420, vaccine 0.230, dental 0.150, or surgery 0.200. What is the probability a visit is vaccine or dental, to three decimals?
Each donated book is exactly one genre: mystery 0.210, fantasy 0.270, biography 0.190, or history 0.330. What is the probability a donated book is fantasy or history, to three decimals?
A bike-share trip is exactly one duration group: under 10 min 0.360, 10-19 min 0.290, 20-29 min 0.210, or 30+ min 0.140. Find the probability a trip is under 10 min or 20-29 min, to three decimals.
A restaurant records each takeout order as exactly one payment type: cash 0.120, debit 0.330, credit 0.410, or gift card 0.140. Find the probability an order uses debit or gift card, to three decimals.
Each park survey response names exactly one favorite activity: walking 0.390, biking 0.170, fishing 0.110, or picnicking 0.330. What is the probability a response names walking or fishing, to three decimals?
A science fair project is exactly one category: biology 0.240, chemistry 0.180, physics 0.220, or engineering 0.360. Find the probability a project is chemistry or engineering, to three decimals.
Each weather report for a day is exactly one main condition: sunny 0.310, cloudy 0.280, rainy 0.260, or snowy 0.150. Find the probability the condition is cloudy or snowy, to three decimals.
One card is drawn from a standard 52-card deck. Event H is that the card is a heart, and event Q is that the card is a queen. Which statement correctly describes H and Q?
One integer is selected from 1 through 20. Event E is that the integer is even, and event O is that it is odd. Which statement is correct?
A student is chosen from a school. Event S is that the student is a senior, and event C is that the student is in chorus. Which statement is correct?
A traffic light is observed at one instant. Event R is that the light is red, and event G is that the same light is green. Which statement is correct?
One customer at a store is selected. Event C is that the customer used a coupon, and event D is that the customer paid with a debit card. Which statement is correct?
One month is chosen from a calendar year. Event J is that the month is January, and event A is that the month is August. Which statement is correct?
One shirt is picked from a team store. Event B is that the shirt is blue, and event L is that the shirt is a large size. Which statement is correct?
One roll of a standard six-sided die is observed. Event T is that the result is 2, and event F is that the result is 5. Which statement is correct?
In a marching band, 0.450 of members play brass, 0.300 march in the front line, and 0.620 play brass or march in the front line. Find the probability a member does both, to three decimals.
At a hospital, 0.520 of nurses work day shift, 0.280 work in pediatrics, and 0.690 work day shift or in pediatrics. What is the probability a nurse does both, to three decimals?
In a city survey, 0.370 of adults ride the bus, 0.420 ride a bike, and 0.650 ride the bus or a bike. Find the probability an adult does both, to three decimals.
At a gym, 0.330 of members use the pool, 0.460 use the weight room, and 0.700 use the pool or the weight room. What is the probability a member uses both, to three decimals?
In a school survey, 0.580 of students own a bike, 0.240 own a skateboard, and 0.710 own a bike or a skateboard. Find the probability a student owns both, to three decimals.
For an animal shelter, 0.410 of pets are dogs, 0.350 are younger than one year, and 0.630 are dogs or younger than one year. What is the probability a pet is both, to three decimals?
At a college, 0.490 of students take biology, 0.310 take statistics, and 0.670 take biology or statistics. Find the probability a student takes both, to three decimals.
In a delivery company, 0.260 of packages are marked fragile, 0.530 are shipped overnight, and 0.680 are fragile or overnight. What is the probability a package is both, to three decimals?
At a museum, 0.340 of visitors buy a guidebook, 0.290 join a tour, and 0.540 buy a guidebook or join a tour. Find the probability a visitor does both, to three decimals.
In a phone survey, 0.470 of respondents use streaming music, 0.380 use podcasts, and 0.720 use streaming music or podcasts. What is the probability a respondent uses both, to three decimals?
Crack the passcode before the zombies get in.
Answer, then swat bugs for bonus points.
Race through questions at your own speed.
Same question on every screen. Fastest wins.

Pick a tile, answer, hit bonuses and steals.
The Multiplication Rule and Independence
40 questions