Question

A bag contains only red , yellow brown and green marbles

the probabilities of selecting each colour are below
red - 5x
green - 2x
brown - 3x
yellow - 4x
find the probability of selecting a yellow marble​

Answer 1

2/7

Explanation:

The total of all probabilities of possible outcomes must be 1, so we require ...

5x +2x +3x +4x = 1

14x = 1 . . . . . . . . collect terms

x = 1/14 . . . . . . . divide by 14

Then the probability of selecting a yellow marble is ...

4x = 4(1/14) = 2/7