What will be The First Number? If

The sum of three numbers is 392. The ratio of first and second number is 2:3 and that of second and third number is 5:8. Then the first number is

  1. 100
  2. 80
  3. 120
  4. 60
Monis Rasool Professor Asked on 15th September 2015 in Maths.
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1 Answer(s)

Answer: (2) 80

Explanation:-
The ratio of first and second numbers = 2: 3
The ratio of second and third numbers = 5: 8

Then, the ratio of first, second and third numbers = 2 x 5: 3 x 5: 3 x 8
= 10: 15: 24

The sum of the three numbers = 392
Then, 10X + 15X + 24X = 392
59 X = 392
X = 392/59
X = 8

Then, the value of first number is 10X = 10 x 8 = 80

Hence, the answer is (2) 80.

Anurag Mishra Professor Answered on 15th September 2015.
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