Question

The probability that the fifth day of a randomly chosen month of a randomly chosen year will be a Friday, is:

• A. $\frac{2}{7}$
• B. $\frac{1}{7}$
• C. $\frac{1}{14}$
• D. None of the above

Answer 1

The correct option is B $\frac{1}{7}$

The randomly selected month of a randomly selected year can be Sunday, Monday, ..., Saturday with equal probability. The number of cases in favor of a friday is 1. Hence, the required probability is $\frac{1}{7}$