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A bag contains 6 green marbles, 18 red marbles, 2 white marbles, and 4 black marbles. What is the probability of drawing a black marble out of the bag?

Question

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A bag contains 6 green marbles, 18 red marbles, 2 white marbles, and 4 black marbles. What is the probability of drawing a black marble out of the bag?

rainbow_rocks03 · Answer

No direct answers give the explanation too.

rainbow_rocks03 · Answer

A. 1/3
 
 
 B. 1/30
 
 
 C. 2/15
 
 
 D. 1/4

rainbow_rocks03 · Answer

@samjordon @NeonStrawsForever @TheSmartOne @sleepyjess

kropot72 · Answer

$$\large P(black)=\frac{number\ of\ black}{total\ number\ of\ marbles}$$

rainbow_rocks03 · Answer

4 black/30 total

kropot72 · Answer

Correct. Now simplify 4/30.

rainbow_rocks03 · Answer

How do I simplify it? I divide 4 on both sides?

kropot72 · Answer

The highest common factor of 4 and 30 is 2. So divide 4 by 2 and divide 30 by 2.

anonymous · Answer

c

rainbow_rocks03 · Answer

oh ok. 4 / 2 = 2 & 30 / 2 = 15 so it is 2/15

kropot72 · Answer

Correct.

rainbow_rocks03 · Answer

No direct answers I aready typed that. :)

rainbow_rocks03 · Answer

thx for the help @kropot72

kropot72 · Answer

You're welcome :)