Question

There is a bag with only red marbles and blue marbles.

The probability of randomly choosing a blue marble is
There are 63 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

There might be 31 or 32

Explanation:

I would have a better answer if i knew the probability of the blue marbles being chosen srry.