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Question

What is the probability of getting 2 heads in 3 tosses?


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Solution

Find the probability of getting 2 heads in 3 tosses:

The probability of an event is,

P(E)=NumberoffavourableoutcomesTotalnumberofoutcomes

When a coin is tossed 3 times, the possible outcomes are:

TTT,TTH,THT,THH,HHH,HHT,HTH,HTT

The total number of outcomes =8

Let E be the event of getting 2 heads.

E=THH,HHT,HTH

The number of a favorable outcomes =3

Then, the probability of getting 2 heads is,

PE=38

Hence, the probability of getting 2 heads in 3 tosses is 38.


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