Mark the correct alternative in the following:

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


P(selected coupon bears number 9)= p


= 3/5

P(selected coupon bears number 9) = p(all coupons bear number 9) – p( selected coupon bears number 8)


p(that all coupon bear number 9)

P(x=7)= 7C7 p7 q0

= p7

P(that the selected coupon bears number 9)

P= 8/15

P(x=7)= 7C7 p7 q0

= p7

Required probability