Can anyone explain this question as I can’t able to understand the 5lb explanation?
let us assume that there are x monsters at the convention.
2/5x do not have horns, which means 3/5x have horns.
So 3/5x = 1/7x + 1/3x + 26 (having horns)
Simplifying this, we get 13/105x = 26
so, x = 210
Thank you so much @bhowmickkaran
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