Question

each two digit number are written on a paper slip and these are all put in a box what is the probability that the product of the digit of a number drawn is a prime number what if three digit numbers are used instead ​

Answer 1

Answer:

THE PROBABILITY FOR THE 2 DIGIT NUMBER WILL BE - 21/90

HOPE IT HELPS AND i AM SORRY IF IT IS INCORRECT!!

Answer 2

Total number of two digit =99-10+1=90

12, 13, 15, 17, 21, 31, 51, 71=8

ie, (1, 2)(1, 3), (1, 5),(1, 7),( 2,1)(3, 1), (5, 1), (7, 1)

p(product of prime)= 8/90

=4/45