Question

What is the missing numerator? blank over five plus eighteen over twenty equals thirty over twenty 8 5 3 2

Answer 1

Given:

`(?)/(5)+(18)/(20)=(30)/(20)`

To find:

The missing value.

Solution:

Let x be the missing value.

We have,

`(x)/(5)+(18)/(20)=(30)/(20)`

`(x)/(5)+(9)/(10)=(3)/(2)`

Subtract
`(9)/(10)` from both sides.

`(x)/(5)=(3)/(2)-(9)/(10)`

`(x)/(5)=(15-9)/(10)`

`(x)/(5)=(6)/(10)`

`(x)/(5)=(3)/(5)`

Multiplying both sides by 5, we get

`x=3`

So, the missing value is 3.

Therefore, the correct option is C.