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You randomly draw a marble from a bag of marbles that contains 7 blue marbles 2 green marbles and 1 red marbles

You randomly draw a marble from a bag of marbles that contains 7 blue marbles 2 green-example-1
User Bkribbs
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Given the following:

7 blue marbles

2 green marbles

1 red marbles

We to find the probability of not drawing a blue marble.

We will be solving it in two ways.

First let's get the total marbles

Total Marble = 7 + 2 + 1 = 10

recall that probablity is number of favourable outcome divide by number of total outcome.

So,

probablity of Drawing a Blue Marble is = 7/10

probability of not Drawing Blue Marbles = 1 - Probability of Drawing Blue Marbles

= 1 - 7/10

= 10 - 7

10

= 3/10

OR

Probability of not Drawing Blue Marbles = Probablity of drawing Green or Red Marbles.

= 2/10 + 1/10

= 3/10

Therefore, the probability of not Drawing Blue Marbles is 3/10.

User Aust
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