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There are 30 pens in a box. 12 of the pens are black. 7 of the pens are green. The rest of the pens are red. One of the pens is chosen at random. Find the probability that the pen is red.
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41 votes
41 votes
There are 30 pens in a box.

12 of the pens are black.
7 of the pens are green.
The rest of the pens are red.
One of the pens is chosen at random.
Find the probability that the pen is red.

User Raymi
by
2.7k points

2 Answers

18 votes
18 votes
30-12=18-7=11 there for the 11
pens that are lefted are red
User Gabagool
by
3.1k points
22 votes
22 votes

Explanation:

30-(12-7)= red pens

30-19

11

Probability=

11/30

User TheChampp
by
2.5k points
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