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?

Kishan Patel asked Oct 15, 2022

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13 votes

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?

Kishan Patel asked Oct 15, 2022

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21 votes

Answer:12/15

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

then add 12+3=15

Ankur Sethi answered Oct 22, 2022

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