# JEE Class main Answered

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

Asked by laks78 | 13 May, 2019, 11:37: PM

Expert Answer

Total number of ways = 15

^{7}According to the question we must select 7 coupons numbered from 1 to 9 such that 9 is selected at least once.

Total number of favourable ways = 9

^{7}- 8^{7}Required probability = (9

^{7}- 8^{7})/15^{7}
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