Question

There is a bag with only red marbles and blue marbles.
The probability of randomly choosing a blue marble is
1 /8th
.
There are 72 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

Step-by-step explanation:

If the probability of getting a blue marble is 1/8

so there are 1 blue marble per 8 marble .

so the value of red marble =

$\frac{7}{8} \times 72 = 63$

So there are 63 red marble and 9 blue marble.