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

Question

Philoid · Accepted Answer

Given:

P(selected coupon bears number 9)= p

p=9/15

= 3/5

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

n=7

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

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

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