If four coins are tossed, the probability of getting two heads and two tails is__________?
Correct answer: A. 3/8
- A. 3/8
- B. 6/11
- C. 2/5
- D. 4/5Education
Explanation
The two heads can be placed among four tosses in C(4,2) = 6 ways. Since four coins have 2^4 = 16 equally likely outcomes, the probability is 6/16 = 3/8. The likely wrong choice is 2/5, which does not account for all equally likely arrangements of the two heads.
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