Correct Answer - Option 4 : 15/16
Given:
A coin has been tossed 4 times.
Calculation:
If four coins are tossed, the total cases = 24 = 16
In a toss, there are two possibilities, T or H
So, the probability of getting head = 1/2
The probability that at least one head turns up = 1- the probability that no head appears in four toss
⇒ 1- the probability of getting tail in four toss
⇒ 1- (1/2)4
⇒ 1- (1/16)
⇒ (16-1)/16
⇒ 15/16
∴ The probability of getting at least one head is 15/16.
