Question

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Here is the sample space for three tosses of a coin: {HHH, HHT, HTH, HTT, THH, THT, TTH, TTT} Calculate the probability that this compound event will yield a result of 1 head and 2 tails (in any order).

A) 0.125

B) 0.375

C) 0.333

D) 0.25

Answer 1

The answer is C.0.333

Answer 2

If we take all the possible flip combos: HHH, HHT, HTH, HTT, THH, THT, TTH, TTT and find all the ones that fit the conditions(result of 1 head and 2 tails): HTT, TTH, THT we get a ratio of 3/8. If you divide 3 by 8 you get 0.375, which is option B.  If you have any questions, pls tell me!