Question

PRACTICE ZONE !

A bag contains only black and blue-coloured stones. If the number of stones, in the given order
is in the ratio 3:7, then find the percentage of black and blue-coloured stones in the bag​

Answer 1

Answer:

30% and 70% respectively

Step-by-step explanation:

let no. of black be 3x and blue be 7x

total stones is 10x

Now

black % =. ( 3x * 100)/10x = 30%

blue % = (7x * 100)/10x =70%

Hope it helps you

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Answer 2

Answer:

Ratio of black and blue-coloured stones = 3:7

We can write this as 3x and 7x

3x+7x=100 (as we know percentage=100)

10x=100

=, x=100/10=10

(Black)3x=3*10=30%

(Blue-coloured)7x=7*10=70%

I hope it will help you