(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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Revision as of 14:10, 2 October 2008
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 for second coupon
~Geom(1/2)
Avg. # of bars = 1 + 2 = 3
