Please explain this to me because im really stumped here!!: The probability of winning a game is 20%. If you play 20 times, how many times should you expect to win?
A.4 times
B.10 times
C.16 times
PLEASE HELP!!!!
.20 * 20 = 4
What about the other answers
The other answers, 10 and 16, are incorrect.
If the probability of winning a game is 20%, and you play 20 times, you can expect to win 4 times.
2. The probability of having a winning raffle ticket is 15%. If you bought 40 tickets, how many winning tickets should you expect to have?
O3 tickets
O6 tickets
O15 tickets
The expected number of winning tickets can be calculated by multiplying the total number of tickets by the probability of winning:
Expected number of winning tickets = 0.15 * 40 = 6
Therefore, you should expect to have 6 winning tickets if you bought 40 tickets.
The answer is B. 6 tickets.
3. A survey of a random sample of moviegoers shows that 40% purchase popcorn to eat while watching the (1 point) movie. If a theater has 80 people in it, how many people should you expect to have purchased popcorn?
040 people
O36 people
O32 people
If 40% of moviegoers purchase popcorn and there are 80 people in the theater, the expected number of people who purchased popcorn can be found by:
Expected number of people who purchased popcorn = 0.40 x 80 = 32
Therefore, you should expect 32 people to have purchased popcorn if there are 80 people in the theater.
The answer is C. 32 people.
4. A manufacturer finds that 10% of the flashlights in a sample are defective. Predict how many defective flashlights there will be in a shipment of 4,000 flashlights.
O4 flashlights
O40 flashlights
0400 flashlights
If 10% of the flashlights are defective in a sample, then the probability of any flashlight being defective is 0.10.
Multiplying this probability by the number of flashlights in the shipment of 4,000, we get the expected number of defective flashlights:
Expected number of defective flashlights = 0.10 x 4,000 = 400
Therefore, we can predict there will be 400 defective flashlights in the shipment of 4,000.
The answer is C. 400 flashlights.
5. In a random sample of 30 sixth graders, 9 had traveled outside of the United States. There are a total of
120 sixth graders in the school. Predict how many students have traveled outside of the United States.
O 28 students
O 36 students
O45 students