A bag contains 1000 pens with different colours. 100 pens are taken out from the bag, out of which 20 were red, 35 were green, 15 were blue and remaining were black in colour. A pen is picked up from these 100 pens. What is the probability that is the pen is (a) not red (b) green

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Answers

2016-03-02T17:43:48+05:30
A) 80/100=4/5
b)35/100= 7/20
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2016-03-02T17:46:42+05:30
A) Total outcomes=100
no. of black pens=30
Not red pens =100-20=80
So, favourable outcomes=80
probability=favourable outcomes/total outcomes
probability=80/100
=4/5
b)Total outcomes=100
favourable outcomes=35
probability=35/100
=7/20
Hope it was helpful
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