Question

12. Three numbers are in the ratio 5 : 6:7. The sum of
its largest and smallest numbers equals the sum of
the third number and 48. Find the third number.
(1) 36
(2) 42
(3) 48
(4) 54
(5) None of these​

Answer 1

Step-by-step explanation:

Ratio of three numbers = 5x : 6x : 7x

7x + 5x = 6x + 48

12x = 6x + 48

6x = 48

x = 8

The numbers are 5(8) = 40 , 6(8) = 48

and 7(8) = 56

So , The third or middle number is 48 .