Question

a two digit number is to be formed using the digits 0, 1 ,2, 3 repeatation of the digit is allowed find the probability that a number so formed is a prime number​

Answer 1

n(S)= 12

n(A)=5

it's quite long so here is the answer for u to check...

hope this helps

Answer 2

S={10, 11,12,13,20,21,22,23,30,31,32,32}

n(S)=12

Event A = A prime number is formed.

A={11,13,23,31}

n(A)=4

P(A)=n(A)/n(S) =4/12 =1/3

P(A)=1/3