A coin is tossed 4 times. What is the probability of getting

A coin is tossed 4 times. What is the probability of getting heads exactly 3 times?

Number of favourable cases are given by
H H H T
H H T H
H T H H
T H H H
Total number of cases = ²C₁ × ²C₁ × ²C₁ × ²C₁ = 16

∴ Probablity =		4	=	1
		16		4