Same bar graph as before ($A=20$, $B=35$, $C=15$, $D=30$). By how many units do the sales of $B$ exceed…

Same bar graph as before ($A=20$, $B=35$, $C=15$, $D=30$). By how many units do the sales of $B$ exceed those of $C$?
  1. $10$
  2. $15$
  3. $20$
  4. $25$

Solution

$35 - 15 = 20$ units.

Asked in: IMO

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