Question

There is a bag with only red marbles and blue marbles.
The probability of randomly choosing a blue 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:

65

Step-by-step explanation:

12 + 7 = 19

84 -19 = 65

please mark as brainiliest

Answer 2

Answer:

Probability of choosing blue marble =7/12

so no of blue marbles= 7/12 x 84

=49 marbles

so no. of red marbles= 84- 49 = 35