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  1. The sum of two number is 8 and their product is 15. The sum of their reciprocals is
    1. 8
      15
    2. 15
      8
    3. 23
    4. 7
Correct Option: A

If the numbers be x and y,
then
x + y = 8 ....... (i)
xy = 15 ...... (ii)
Dividing equation (i) by (ii)

x + y
 =
8
 ⇒ 
x
+
y
 =
8
xy15xyxy15

1
 +
1
 =
8
yx15


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