Assertion (A) : The probability of getting exactly 2 heads in tossing a coind thrice is `((1)/(2))^(3)`
Reason (R ) : The probability of getting exactly r heads in tossing n coins is `(.^(n)C_(r ))/(2^(n))`.
The correct answer is

Options

A. Both A and R are true, R is the correct explanation of A
B. Both A and R are true, R is not the correct explanation of A
C. A is true but R is false
D. A is false R is true

Answer

D