Question
If a coin is tossed thrice, then the probability of getting head twice is_________________.
Hint:
Probability of an event = Number of favourable outcome / Total number of outcomes
The correct answer is:
Here, a coin is tossed thrice are : (H, H, H) , ( H, H,T) , ( H, T, H) , ( T, H, H) , ( T, T, T) , ( T, T, H) , ( T, H, T) , ( H, T, T) .
Total number of outcomes = 8
Number of favourable outcome = Number of outcomes with 2 tails = 3
Therefore, P ( getting head twice) = 3/8
Hence, the correct option is (b).
0 ≤ P(E) ≤ 1
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