To figure the probability of getting at least one head on your first two coin tosses,
figure out how likely it would be not to get any heads at all, and subtract from one.

Question

To figure the probability of getting at least one head on your first two coin tosses,
 figure out how likely it would be not to get any heads at all, and subtract from one.

Quizplus · Accepted Answer

The probability of not getting any heads in two coin tosses (getting tails both times) is 1/4 (or 0.25), so subtracting this from 1 gives the probability of getting at least one head, which is 3/4 (or 0.75).

To Figure the Probability of Getting at Least One Head