Hi All,

I am stuck in the below problem, so need assistance.

Q1 - A person draws a card from a pack of 52 , replaces it and shuffles it. He continues doing it until he draws a heart.what is the probability he has to make 3 trails ?

Book Answer is 9/64

Q2 - If 4 whole numbers was taken at random and multiplied together, what is the chance that the last digit in the product is 1,3,7 or 9 ?

Any help would be greatly appreciated.

Thanks,

Ashish