Question

a bag containing red and blue balls. the balls are the ratio red:blue=3:5 write down the fraction of the balls that are red​

Answer 1

The fraction of the balls that are red is 3/5

Answer 2

Answer:

Let the red balls (R) are 2x then green (G) balls are 3x. The ratio of blue balls (B) to green balls are given to be 7 : 15.

=> B / G = 7/15 => B/3x = 7/15 on cross multiplication, we get

15B = 7x*3 => 15B = 21x => B = 21x/15 = 7x/5

So, the ratio of R:G:B = x : 2x : 7x/5 => On multiplication with 5 through out we get 5x : 10x: 7x

The total is 5x + 10x + 7x = 22x

There are 42 balls. So, the number of red balls (R) = 5x/22x * 42 =9.54

Step-by-step explanation: