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 :

Fifteen coupons 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 atmost 9 is

Fifteen coupons are numbered 1, 2, 3,…, 15 respectively. Seven coupons are selected random one at a time with replacement. The probability that the largest number appearing on the selected coupons is atmost 9, is :

Seven chits are numbered 1 to 7. Four chits are drawn one by one with replacment.The probability that the least number appearing on any selected chit is 5 is :