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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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3 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 Roman L
by
8.2k points

2 Answers

3 votes
30-12=18-7=11 there for the 11
pens that are lefted are red
User Jagajit Prusty
by
8.7k points
4 votes

Explanation:

30-(12-7)= red pens

30-19

11

Probability=

11/30

User SFuller
by
8.0k points
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