In a cinema, male to female ratio is - 1:3. The ratio of the females, who like popcorn to females who don't like popcorn is 2:1. 10 girls don't like popcorn. How many people are there in the cinema altogether?

Ratio of females who like popcorn to the females who don't like popcorn is 2:1. If 10 females don't like popcorn, then (10 *2) 20 females like popcorn. 10+20 = 30 females altogether. 30/3= 10 males altogether. 30 females + 10 males = 40 people altogether in the cinema.

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