Question

There is a bag with only red marbles and blue marbles.
The probability of randomly choosing a red marble is 7/10
There are 42 red marbles in the bag and each is equally likely to be chosen.
Work out how many marbles in total there must be.

Answer 1

Answer:

60

Step-by-step explanation:

P(red marble) = 42 / n = 7 / 10

So n=60