Question

Three coins are tossed once. Find the probability of getting
(1)atleast two heads
(2) no heads.​

Answer 1

Answer:

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Step-by-step explanation:

Three coins are tossed once,. the probability of getting at least 2 heads are as follows :

The possible outcomes are :

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

as we see in the table

no. of outcomes / total no. of outcomes

therefore 4/8

the answer is 1/2 .

and

no head : TT

answer is 1/4

Answer 2

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Sample space = {HHH, HHT, HTH, THH, HTT, TTH, THT, TTT} => 8

i) atleast two heads:

Favourable cases = {HHH, HHT, HTH, THH} => 4

Total cases = 8

Thus, probability = 4/8 = 1/2

ii) no heads

Favourable cases = {TTT} => 1

Total cases = 8

Thus, probability = 1/8

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