An urn contains 60 blue pens and 40 red pens. Half of the pens of each one is
defective. If one pen is chosen at random, what is the probability that it is a
defective or a red pen?
Answers
Answered by
5
Blue pen : 60
Red pen :40
Total pen: 100
Let event A , be probability of getting defective pen or red pen.
p(A)=20/100
=0.2
Red pen :40
Total pen: 100
Let event A , be probability of getting defective pen or red pen.
p(A)=20/100
=0.2
harisj58:
it says defective "or" a red pen not "and"..
don't you think that affects the answer?
Answered by
2
Answer:
P(blue) : 60/100
P( red). : 40/100
P(defective) : (20+30)/100
P(defective or red) : 50/100 + 40/100 - 20/100 = 7/10
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