Question5A box contains red, blue and green marbles in the ratio 5:3:7

1.	Question5A box contains red, blue and green marbles in the ratio 5:3:7. If there arealtogether 90 marbles, find the number of marbles of each colour.(a)
Answer» Let the ratio be xSo, red , blue and green are 5x, 3x, 7x respectively. According to question, 5x + 3x + 7x = 9015x = 90x = 90/15x = 6 So, blue marbles are 5 × 6 = 30Red marbles are 3 × 6 = 18green marbles are 7 × 6 = 42

Question5A box contains red, blue and green marbles in the ratio 5:3:7. If there arealtogether 90 marbles, find the number of marbles of each colour.(a)

Answer»

Let the ratio be xSo, red , blue and green are 5x, 3x, 7x respectively.

According to question,

5x + 3x + 7x = 9015x = 90x = 90/15x = 6

So, blue marbles are 5 × 6 = 30Red marbles are 3 × 6 = 18green marbles are 7 × 6 = 42