Question

5. IF three different coins are tossed together, then find the probability of getting two heads.
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Answer 1

Step-by-step explanation:

When we toss three coins simultaneously then the possible of outcomes are:

HHH or HHT or HTH or THH or HTT or THT or TTH or TTT respectively;

Where H is denoted for head and T is denoted for tail.

Therefore, total numbers of outcome are 2

3

=8

(i) Exactly two heads

Favourable cases ={HHT,HTH,THH}

Probability of getting exactly two heads =

8

3

(ii) At least two heads

Favourable cases ={HHH,HHT,HTH,THH}

Probability of getting at least two heads =

8

4

=

2

1

(iii) At least two tails

Favourable cases ={HTT,THT,TTH,TTT}

Probability of getting at least two tails =

8

4

=

2

1