In a party, 60% of the invited guests are male and 40% are female. If 80% of the invited guests attended the party and if all the invited female guests attended, what would be the ratio of males to females among the attendees in the party? A. 2:3 B. 1:1 C. 3:2 D. 2:1

GATE 2018 · General Aptitude · Ratio Proportion · medium

Answer: The ratio of males to females among attendees is 1:1 (Answer B).

1. Set up counts using 100 as total invited: Male invited = 60% * 100 = 60; Female invited = 40% * 100 = 40; Total attended = 80% * 100 = 80
2. Apply the constraint: all females attended: Female attended = 40
3. Find male attendees and compute ratio: Male attended = 80 - 40 = 40; Ratio = 40:40 = 1:1