Problems based on Numbers Test 2

Question : 31 of 40

Marks: +1, -0

The sum of two numbers is 40 and their product is 375. The sum of their reciprocals is:

Solution:

Let the two numbers be x and y; then
x + y = 40 ...(i)
xy = 375 ...(ii)
From equations (i) & (ii)

{x+y}/{xy}=40/375

⇒1/x+1/y=8/75

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