In a bag one-fifth of the balls are black and one-third are red, there are 15 dozen green balls and 30 blue balls. Find the number of black balls and red balls in the bag.
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Answer:
no. of black balls=90
no. of red balls=150
Step-by-step explanation:
let total number of balls=x
black balls=x/5
red balls=x/3
x/5+x/3+180+30=x
x/5+x/3+210=x
3x+5x/15=x-210
8x=15(x-210)
8x=15x-3150
7x=3150
x=450
no. of black balls=x/5=450/5=90
no. of red balls=x/3=450/3=150
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