A double bar graph shows boys/girls in classes $A,B,C$: $A: 20/15$, $B: 18/22$, $C: 25/20$. Total students…

A double bar graph shows boys/girls in classes $A,B,C$: $A: 20/15$, $B: 18/22$, $C: 25/20$. Total students in class $B$ is:
  1. $35$
  2. $38$
  3. $40$
  4. $45$

Solution

Class $B$ total $= 18+22 = 40$.

Asked in: IMO

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