A fast-food restaurant attaches prize coupons to the cups used to serve large drinks. Seventy percent (70%) of the coupons say “Play Again,” 15% say “Win a free small drink,” 10% say “Win a free ice cream cone,” and the rest say “Win a free burger.”  Given what you know about probability and probability models, which one of the following statements must be correct? 1. More than 10% of the coupons say “Win a free burger.” 2. The proportion of coupons that say “Win a free burger” is equal to 0.50. 3. If we randomly select one customer who has received a prize coupon, there is a 5% chance that coupon says “Win a free small drink” or “Win a free ice cream cone.” 4. If we randomly select one customer who has received a prize coupon, there is a 25% chance that coupon says “Win a free small drink,” “Win a free ice cream cone,” or “Win a free burger.” 5. If we randomly select one customer who has received a prize coupon, there is a 15% chance that coupon says “Win a free ice cream cone” or “Win a free burger.”

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter12: Probability
Section12.2: Introduction To Probability
Problem 81E: The following description of the classic Linda Problem appeared in the New Yorker. In this...
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19. A fast-food restaurant attaches prize coupons to the cups used to serve large drinks. Seventy percent (70%) of the coupons say “Play Again,” 15% say “Win a free small drink,” 10% say “Win a free ice cream cone,” and the rest say “Win a free burger.”  Given what you know about probability and probability models, which one of the following statements must be correct?


1. More than 10% of the coupons say “Win a free burger.”
2. The proportion of coupons that say “Win a free burger” is equal to 0.50.
3. If we randomly select one customer who has received a prize coupon, there is a 5% chance that coupon says “Win a free small drink” or “Win a free ice cream cone.”
4. If we randomly select one customer who has received a prize coupon, there is a 25% chance that coupon says “Win a free small drink,” “Win a free ice cream cone,” or “Win a free burger.”
5. If we randomly select one customer who has received a prize coupon, there is a 15% chance that coupon says “Win a free ice cream cone” or “Win a free burger.”
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