CAT
Exam
Numerical Ability
Probability
A survey shows that 61%, 46% and 29% of the people watched “3 idiots”, “Rajneeti” and “Avatar” respectively. 25% people watched exactly two of the three movies and 3% watched none. What percentage of people watched all the three movies?
Read Solution (Total 2)
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- let 100 be total no.
100-3=97 watch movies
97=61+29+46-[25/100{61+46+46+29+29+61}]+x
on solving x=29 - 8 years agoHelpfull: Yes(2) No(3)
- we know that,
exactly 1 + 2 exactly 2 + 3 exactly 3 = 61 + 46 + 29 = 136 % (1)
exactly 1 + exactly 2 + exactly 3 = 100 - 3 = 97 % (2)
now , (1) -(2)
exactly 2 + 2 exactly 3 = 39
given exactly 2 = 25%
so, 25 + 2 exactly 3 =39
exactly 3 = 7 % - 7 years agoHelpfull: Yes(1) No(1)
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