Question

Six identical coins are arranged in a row. The number of ways in which the number of tails is equal to number of heads is

• A. 20
• B. 22
• C. 9
• D. 40

Answer 1

Answer: (A)

20

Answer 2

$\frac{6!}{3!3!}$ = $\frac{6 \times 5 \times 4}{6}$ = 20