Fifteen coupens are numbered 1,2,3,...15...

Fifteen coupens are numbered `1,2,3,...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 :

`(9/15)^6`

`(8/15)^7`

`(3/5)^7`

none of these

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