Question

Blocks numbered 0 through 9 are placed in a box, and a block is randomly picked.

The probability of picking an odd prime number is
The probability of picking a number greater than 0 that is also a perfect square is

Answer 1

P(odd prime number) = 2/5

P(number is greater than 0 and is also a perfect square) = 1/5

Explanation:

numbers = 0, 1, 2, 3, 4, 5, 6, 7, 8, 9

odd prime number = 1, 3, 5, 7

total numbers = 10

Probability of picking an odd prime number = 4 / 10 = 2 / 5

number greater than 0 and is also a perfect square = 4, 9

Probability of picking a number that is greater than 0 and is also a perfect square = 2 / 10 = 1 / 5