Question

Each two digit number is written on a paper slip and these are all put a box. What is the probability that the product of the digits of a number drawn is a prime number? What if four digit numbers are used instead?

Answer 1

HOW ARE YOU

WHENYOU FOLLOWME MEANSONLY IWILL ANSWERYOUR QUESTION

Answer 2

Step-by-step explanation:

If the product of two digits is prime, one of the digits will be 1 and the other digit a prime number. 4 digits are prime. They are 2, 3, 5, 7.

so, the numbers are 12, 13, 15, 17, 21, 31, 51, 71. I.e. total numbers are 8.

The total count of 2 digit numbers is 90.

so, probability = 8/90