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Solution


Q.

Two coins are tossed together. The probability of getting at least one tail is:
1 1/4  
2 1/2  
3 3/4  
4 1  

Ans.

(3)

When two coins are tossed, the total possible outcomes are S=HT,TH,HH,TT⇒n(S)=4

The outcomes favourable to event E‘at least one tail’ are E=TH,HT,TT⇒n(E)=3

∴ The probability of getting at least one tail P(E)=n(E)n(S)=34