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Mathematics, 22.01.2021 14:00 SuBzErO24
Example 24 In a school there are 20 teachers who teach mathematics or physil
these, 12 teach mathematics and 4 teach both physics and mathematics. How Ex
teach physics ?
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Example 24 In a school there are 20 teachers who teach mathematics or physil
these, 12 teach mathem...
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