Probability Practice Test 2

Question : 17 of 37

Marks: +1, -0

Fifteen coupons are numbered 1, 2, ..., 15 respectively. Seven coupons are selected at random one at a time with replacement. The probability that the largest number appearing on a selected coupon is 9 is

$(9/16)^6$
$(8/15)^7$
$(3/5)^5$
None of these

Validate

Solution:

Favourable ways = 9
Total ways = 15
∴ P (greatest number 9) in one chance

=9/15 = 3/5

∴ P (greatest number 9 in all chances)

=(3/5)^7

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