Probability - Quantitative Aptitude (MCQ) questions for Q. 25

Q.  Three coins are tossed. What is the probability of getting at most two tails?
- Published on 19 Oct 15

a. 7/8
b. 1/8
c. 2/8
d. 4/8

ANSWER: 7/8
 
It is given that 3 coins are tossed simultaneously.

=>Total outcomes when one coin is tossed=2

=>Total outcomes when 3 coins are tossed= 2n = 2 X 2 X 2

=8 outcomes

Favourable outcomes: TTH, THT, HTT, THH, THT,HHT,HHH=7

Therefore, Probability= 7/8

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