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A box contains 3 black pens, 7 blue pens and 5 red pens. Without replacing the first pen, what is the probability of pulling a red or blue pen?

A box contains 3 black pens, 7 blue pens and 5 red pens. Without replacing the first pen, what is the probability of pulling a red or blue pen?
asked 158k views
1 vote
A box contains 3 black pens, 7 blue pens and 5 red pens. Without replacing the first pen,

what is the probability of pulling a red or blue pen?

asked
User Amir Shirazi
by
8.4k points

1 Answer

6 votes

Answer:12/15

Step-by-step explanation: first you add 7+5=12

then add 12+3=15

answered
User Birol Kuyumcu
by
7.9k points
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