find the sum of all irreducible fraction between 10 and 20 with denominator 3
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40
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find the sum of all irreducible fraction between 10 and 20 with denominator 3
So let us consider the fractions which are not reducible means which are irreducible. So we need to consider the fractions between 10 and 20 having denominator as 3 .
So 10 /3 + 11/3 + 13/3 + 14/3 + 16/3 + 17/3 + 20/3
10 + 11 + 13 + 14 + 16 + 17 + 20 /3 after taking lcm
= 120/3 = 40
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