Asked by Bulama dgn

In an examination 60 candidates offer maths, 80 offer english,and 50 offer physics, if 20 offer maths & english, 15 offer english & physics, 25 offer math & physics and 10 offer all the 3. How many students entered to the examination ?
Answered by Clement
what is the fraction of black toys if there are 10 black toys and 8 yellow toys?
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