Question

The probability that among 7 persons, no 2 were born on the same day of a week is

• A. $\frac{2}{7}$
• B. $\frac{7!}{7}$
• C. $\frac{7!}{7^7}$
• D. $\frac{2}{7^7}$

Answer 1

Answer: (C)

$\frac{7!}{7^7}$

Answer 2

The correct option is (C) : $\frac{7!}{7^7}$.