What is the probability of getting at least 1 head on 3 successive tosses of a coin?
A) 1/8
B) 3/4
C) 5/8
D) 15/16
E) 7/8

Question

Quizplus · Accepted Answer

The probability of getting a head or tail on one toss is 1/2. The probability of getting at least one head on 3 tosses can be calculated by finding the probability of getting all tails and subtracting from 1.
Probability of getting all tails: (1/2) x (1/2) x (1/2) = 1/8
Probability of getting at least one head: 1 - 1/8 = 7/8. Therefore, the answer is E.

What Is the Probability of Getting at Least 1 Head