Answer:
1/15
Explanation:
A two-digit whole number is a number from 10 to 99.
There are 90 such numbers.
For a number to have an integer square root, the number must be a perfect square. Now we need to know the number of 2-digit perfect squares.
It's easier to find that out by listing them:
16, 25, 36, 49, 64, 81
There are six 2-digit perfect squares.
When we choose a 2-digit whole number at random, we have:
The desired outcome is one of 6 numbers.
The total number of possible outcomes is 90.
p(number with integer square root) = 6/90 = 1/15