In a college students can play cricket or basketball. 500 play cricket.220 played both and 600 played basketball. What is the total strength of college?  Select.
A) 800  B) 880  C) 920  D) 950  E) 980

Rationale: p ( c ) = 500 p ( b ) = 600 p ( c n b ) = 220 p ( c u b ) = p ( c ) + p ( b ) - p ( c n b ) = 500 + 600 - 220 = 880 answer : b
Answer: B