Question

1/3 of the pencils in a jar are red and the remaining 10 are green. How many are red.​

Answer 1

There are 5 red ✎ pencils

Explanation:

fraction of green pencils:

`= 1 - (1)/(3) \\ \\ = (2)/(3)`

let total pencils be x :

`(2)/(3) \: of \: x = 10 \: green \: pencils \\ \\ (2)/(3) * x = 10 \\ \\ 2x = 3 * 10 \\ x = (3 * 10)/(2) \\ \\ x = 15 \: pencils`

Total pencils = 15

Red pencils:

`= 15 - 10 \\ = 5 \: pencils`