Find the indicated probability.
-A bag contains 6 red marbles, 3 blue marbles, and 1 green marble. Find P(not blue).
A) 7
B) $\frac { 3 } { 10 }$
C) $\frac { 10 } { 7 }$
D) $\frac { 7 } { 10 }$

Question

Find the indicated probability.
-A bag contains 6 red marbles, 3 blue marbles, and 1 green marble. Find P(not blue). 
A) 7
B) $\frac { 3 } { 10 }$
C) $\frac { 10 } { 7 }$
D) $\frac { 7 } { 10 }$

Quizplus · Accepted Answer

The probability of an event happening is the number of ways that the event can happen divided by the total number of possible outcomes.

In this case, the total number of marbles in the bag is 10 (6 red + 3 blue + 1 green).

The probability of selecting a blue marble is 3/10.

So, the probability of not selecting a blue marble (i.e. selecting a red or green marble) is:

(6 red + 1 green) / 10 total marbles = 7/10

Therefore, the answer is D.

Find the Indicated Probability 310\frac { 3 } { 10 }103​

Find the Indicated Probability $\frac { 3 } { 10 }$