Correct Answer: Option D

Explanation

Hint: Represent the question in a venn diagram, such that
n(B ∩ M) = x
n(B) only = 125-x
n(M) only = 110-x
=> 125-x + 110-x + x = 220
=> x = 15.

n(B) only = 125 - 15 = 110

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