Question

There is a bag with only red marbles and blue marbles.
The probability of randomly choosing a red marble is 7/12
There are 84 marbles in total in the bag and each is equally likely to be chosen.
Work out how many red marbles there must be.

Answer 1

Answer:

84÷12 = 7 common ratio

7×7 red marbles = 49 red marbles

Answer 2

Answer:

79

Step-by-step explanation:

No. of marbles = 84

The probability of randomly choosing a red marble is = 7/12

The probability of randomly choosing a blue marble is = 5/12