Question 77

The reciprocal of the sum of the reciprocals of 2/9 and 7/10 is

Solution

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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