Question

A bag contains 5 blue marbles, 2 black marbles, and 3 red marbles. A marble is randomly drawn from the bag. The probability of not drawing a black marble is . The probability of drawing a red marble is .

Answer 1

The probability of not drawing a black marble is : 8/10, 4/5, 80%

The probability of drawing a red marble is: 3/10, or 30%

Explanation:

Blue marbles: 5

Black marbles: 2

Red marbles: 3

Total marbles: 10

The probability of not drawing a black marble is :

NOT drawing a black marble means you'll draw either a blue or a red one. Combined, red and blue marbles account for 8 marbles out of 10.

So the probability of NOT drawing a black marble is 8/10, 4/5 or 80%

The probability of drawing a red marble is:

There are 3 red marbles, out of 10 marbles.... so the probability of drawing a red marble is 3/10, or 30%