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The sum of two numbers is 10, and their product is 20. What is the sum of their reciprocals?
  1. 1/10
  2. 1/2
  3. 1
  4. 2
Explanation

We are given:

x+y=10

xy=20

The sum of the reciprocals of the two numbers is: 1/x+1/y =x+y/xy

Substitute the given values:

=10/20

=1/2


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