Probability Puzzles
Hard
2 min
Four fair coins are tossed. What is the probability of getting exactly two heads?
Hint
Choose which two of the four positions contain heads.
Answer
3/8.
Explanation
There are C(4,2)=6 outcomes with exactly two heads out of 16 total outcomes. 6/16 = 3/8.
Step-by-Step Solution
Total = 2⁴ = 16.
Favorable = C(4,2) = 6.
Probability = 6/16 = 3/8.
Favorable = C(4,2) = 6.
Probability = 6/16 = 3/8.