Question

a box has coupons numbered from 1 to 100.A coupon is picked.Find the probability that the number is a multiple of 3.​

Answer 1

Answer:

no of coupon of multiple of 3 for an AP ,,as

3,6,9....……..99

here a=3, d=3 no terms

Last term is 99 so,

99=a+(n-1)d

99=3+(n-1)3

(n-1)=96/3=32

n=33

P(e)=33/100=.333