(New page: Each candy bar has a coupon 2 different coupons Any candy bar can have a random coupon Q: How many bars do you need to buy on average to get both coupons? 1 bar = 1 coupon X = # bars ...) |
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Each candy bar has a coupon | Each candy bar has a coupon | ||
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Q: How many bars do you need to buy on average to get both coupons? | Q: How many bars do you need to buy on average to get both coupons? | ||
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1 bar = 1 coupon | 1 bar = 1 coupon | ||
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Avg. # of bars = 1 + 2 = 3 | Avg. # of bars = 1 + 2 = 3 | ||
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| + | [[Main_Page_ECE302Fall2008sanghavi|Back to ECE302 Fall 2008 Prof. Sanghavi]] | ||
Latest revision as of 12:18, 22 November 2011
Question
Each candy bar has a coupon
2 different coupons
Any candy bar can have a random coupon
Q: How many bars do you need to buy on average to get both coupons?
Answer
1 bar = 1 coupon
X = # bars for second coupon
~Geom(1/2)
Avg. # of bars = 1 + 2 = 3
