Question

a box contains red , blue and green marbles in the ratio of 5:3:7. if the number of green marbles in the box is 42 , find the total number of marbles in the Box
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Answer 1

Answer:

The total number of marbles in the Box is 90.

Step-by-step explanation:

A box contains red , blue and green marbles in the ratio of 5:3:7.

Let the number of box containing red , blue and green marbles are 5x , 3x and 7x respectively.

Given,

         The number of green marbles in the box is 42 .

                  $7x=42\\ \\ x=\frac{42}{7}=6$

Total number =$5x+3x+7x=15x\\ \\ 15x=15 \cdot 6=90$