40 Coloured Counters

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There are 40 coloured counters in a box. Half of them are red, one-fifth are yellow and the rest are green. How many are green?

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  1. Anonymous22 December 2020 at 15:48

    First, we need to find out how many are red. If the number of red is half of them, then 20 are red and if 1 fifth of them are yellow, then 8 are yellow. Now if we add 8 and 20 we get 28 and if we subtract that from 40 we get 12

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