Mathematics
Grade-4-
Easy
Question
When a coin is tossed thrice, the probability of an event of head appearing twice is _____.
The correct answer is:
When a coin tossed three times the possible outcomes are
where , H denotes head and T denotes tails . And the no. of possible outcomes is 8 .
The events in which two heads appear are 
No. of events which have two heads apear is 4.
The required probability =
Correct choice is 3 .
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