Let A be the set of people who like pizza and B be the set of people who like Maggi. Then (A ∪ B) = 195 n(A) = 120, n(A ∩ B) = 30
n(A ∪ B) = n(A) + n(B) - n(A ∩ B) 195 = 120 + n(B) - 30 n(B) = 105 Number of people who like Maggi only = n(B) - n(A ∩ B) = 105 - 30 = 75 ∴ Number of people who like Maggi only and not Pizza = 75.