Question

A positive two-digit number is written at random. Determine the probability that the number will be at least 75. Please put answer in the form of a fraction.

Answer 1

5/18

Explanation:

Positive two-digit numbers are:

• Numbers in 10 - 99 interval

Total two-digit numbers:

• 99 -9 = 90

Number of two-digit numbers ≥ 75:

• 99 - 74 = 25

Probability that the number is at least 75:

• 25/90 = 5/18

Answer is 5/18