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Let, the total number of students in the class = 100Then the number of students who answered first question correctly is = n(1) = 75Then the number of students who answered second question correctly is= n(2) = 55Then the number...
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n(a U b) = n(a) + n(b) − n(a ∩ b)
Study the given information carefully and answer the following questions Twelve people are sitting in two parallel rows containing six people each, in such a way that there is an equal distance between adjacent persons. In row-1 P, Q, R, S, T and V are seated and all of them are facing South. In row-2 A, B, C, D, E and F are seated and all of them are facing…
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