Question

The reciprocal of the sum of the reciprocals of 8/7 and 5/6 is:

A) 83/40 B) 42/83 C) 83/42 D) 40/83

Answer 1

Answer:

(c)  83/42

Step-by-step explanation:

lcm of 6 and 7 is 42

so,

(8*6+5*7)/42

= (48+35)/42

=83/42

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Answer 2

Answer:

the correct answer is 42/83

Step-by-step explanation:

lcm of 6 and 7 is 42

so,

(8*6+5*7)/42

= (48+35)/42

=83/42

Now we get our answer by inverting this result as the question asks the reciprocal of the result.