SOLUTION: Suppose that a jar contains 4 pens: 2 black, 1 blue, and 1 red. Three people select a pen at random from the jar, sign a document, and replace the pen in the jar before the next pe

Question 872090: Suppose that a jar contains 4 pens: 2 black, 1 blue, and 1 red. Three people select a pen at random from the jar, sign a document, and replace the pen in the jar before the next person selects a pen. What is the probability that none of the people use the red pen to sign the document?
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
4 pens: 2B,1Blu, 1R
selected 1 (and replaced it in jar)!! mix stays the same for all three
P(a person selects no red) = 3/4
P(1st and 2nd and 3rd do not choose red) = = 27/64
Not: 'and' indicates the multiplication

RELATED QUESTIONS
Suppose that a jar contains 4 pens: 2 black, 1 blue, and 1 red. Three people select a... (answered by Yzeph,Fombitz)

Leo’s pencil case contains 8 black pens, 6 blue pens and 2 red pens. He loses 4 pens, 2 (answered by Boreal)

Leo’s pencil case contains 8 black pens, 6 blue pens and 2 red pens. He loses 4 pens, 2 (answered by jim_thompson5910)

A teacher has two boxes of pens. Box 1 contains 7 blue pens and 3 black pens, box 2... (answered by Boreal,ikleyn)

1. In a box there are 3 red pens, 5 blue pens, and 2 black pens. If a person... (answered by oscargut)

Jar 1 contains 4 red balls and 2 black ball. Jar 2 contains 9 red balls and 3 black... (answered by ewatrrr)

A jar contains 6 red marbles numbered 1 to 6 and 4 blue marbles numbered 1 to 4. A marble (answered by ikleyn)

a jar contains 5 blue marbles, 4 red marbles, 2 yellow marbles, and 1 white marble, if... (answered by JulietG)

A jar contains 4 white, 11 blue, and 13 red marbles. If one marble is drawn at random... (answered by Alan3354)