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Previous Year Question (PYQs)
2
A survey is done among a population of 200 people who like either tea or coffee. It is found that 60% of the pop lation like tea and 72% of the population like coffee. Let x be the number of people who like both tea & coffee. Let m≤x≤n, then choose the correct option.
Solution
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Mohammad Sameer , Last Semester Student , NIMCET Aspirant Commented Jan 10 , 2024
i think (1) should be correct because
n(AUB) = 200 , n(A) = 120 , n(B) = 144 , n( A intersection B ) = x
n(AUB) = n(A) + n(B) - n(A intersection B)
x = 120 + 144 -200
x = 64
n = 120 because maximum no. of population like tea is 120
m = 64 as calculated above
so n-m => 120 -64 => 56
hence (1) is correct
Commented Jan 10 , 2024
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