1. The reciprocal of the sum of the reciprocals of 2/9 and 7/10 is
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By: anil on 05 May 2019 02.14 am
Sum of the reciprocals of 2/9 and 7/10 = $$frac{9}{2} + frac{10}{7}$$ = $$frac{9(7)+10(2)}{14} = frac{63+20}{14}$$ = $$frac{83}{14}$$ => Reciprocal of 83/14 = $$frac{14}{83}$$ => Ans - (A)
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