There are 18 marbles in a bag, all of the same size. The marble; red, green and blue are in the ratio 2:3:4 respectively: find the number of each colour of the marbles

Answer 1

Let the number of red marbles be 2x, the number of green marbles be 3x, and the number of blue marbles be 4x.

Since there are 18 marbles in total, we can write this as:
2x + 3x + 4x = 18
9x = 18
x = 2

Therefore:
Number of red marbles = 2x = 2(2) = 4
Number of green marbles = 3x = 3(2) = 6
Number of blue marbles = 4x = 4(2) = 8

So, there are 4 red marbles, 6 green marbles, and 8 blue marbles in the bag.