Mike has a stack of 10 cards numbered 1 to 10 if he randomly chooses two cards without replacing the first one drawn what is the probability that mick would pick two cards that are prime numbers?
In 1-10 the prime numbers are (2,3,5,7). so out of the 10 numbers you will pick 2 and and replace 1 so the total becomes 9 and the the prime numbers are 4 so it becomes 4/9
