Thank you for visiting A box contains 4 red pens 5 black pens and 3 blue pens If Robert selects one pen and then another pen without putting the. This page is designed to guide you through key points and clear explanations related to the topic at hand. We aim to make your learning experience smooth, insightful, and informative. Dive in and discover the answers you're looking for!
Answer :
Answer:
(p black) = 5/12
(p black) = 4/11
Step-by-step explanation:
Add the pens together to find the total
4 + 5 + 3 = 12
Find the probability of drawing the first black pen.
(p black) = 5/12
The black pen is not replaced, so now there are 11 pens in the box, and there are only 4 black pens.
Find the probability of drawing the second black pen.
(p black) = 4/11
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Rewritten by : Jeany
