Question

Busi has a bag containing 20 balls. There are twice as much yellow balls than blue balls, but yellow balls are only a third of red balls. The green balls are the same number as the blue balls. How many of each of the ball ​

Answer 1

12 red balls

4 yellow balls

2 blue balls

2 green balls

Explanation:

set no. of yellow, blue, red and green ball as y, b, r, g respectively

y=2b

r=3y

g=b

y+b+r+g = 20 (translate all of them into b (smallest in qty)

2b + b + 3(2b) + b = 20

10b = 20

b =2

y = 4, r = 12, b =2, g =2