An unfair coin has a probability 0.4 of landing heads. The coin is tossed two times. What is the probability that it lands heads at least once?
A)0.64
B)0.5
C)0.84
D)0.6

Question

Quizplus · Accepted Answer

The probability of landing heads at least once is 1 minus the probability of landing tails both times. The probability of landing tails both times is (1 - 0.4)^2 = 0.36. Therefore, the probability of landing heads at least once is 1 - 0.36 = 0.64.

An Unfair Coin Has a Probability 0