The ratio of three numbers is 10 : 15 : 13. If 10 percent of the first number is 66, what would be 50 percent of the difference of the third and second number?​

Correct option is B

Given:

The ratio of three numbers is 10 : 15 : 13

10 percent of the first number is 66

Solution: ​

10% of 10 unit = 1 unit 

1 unit = 66 

So, 

50% of ( 15 - 13) unit

= $$\frac{50}{100}\times 2 = 1$$unit

Thus, difference of second and third number is 66