A box contains10 pens, 5 of the pens are red, 4 are balck and 1 are bluem What is the probability of pulling out a black pen first, putting it back into the box, and then pulling a red pen?

Question

Scott Cunningham

Mathematics

11 June, 21:29

A box contains10 pens, 5 of the pens are red, 4 are balck and 1 are bluem What is the probability of pulling out a black pen first, putting it back into the box, and then pulling a red pen?

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Luna Wiley · Answer 1

Pulling out a black pen first will grant you a 40% chance of that occurring, then when you put it back the probability of you pulling out a red pen would be 50% so in decimal form these two values would be. 40 and. 50 multiply these two together you should get. 20 or a 20% chance. Also a written fraction would be 1/5, all of which are valid answers.