Question

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

A) 14/83 B) 83/14 C) 90/83 D) 83/90

Answer 1

Answer:

The answer is C

Step-by-step explanation:

2/9 +7/10

= 2×10+9×7/9×10

= 20+63/90

83/90

Now the reciprocal of sum of reciprocal will be 90/ 83

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