Question

A bag contains 3 red marbles. The ratio of red marbles to blue marbles is 3 : 7.

Answer 1

Step-by-step explanation:

the bag contains 7 blue marbles and total 10 marbles

mark me brainliest

Answer 2

Step-by-step explanation:

3 blue +7 red + 5 yellow = 15 marbles altogether

There are therefore 15 ways to choose 1 marble, but only 3 of those choices give a blue result. The other 12 ways give a non-blue result.

So the probability of getting a blue is p=315=15

The probability of getting non-blue is 1215=45=1−p