Q. 454.7( 6 Votes )

A lot consists of 144 ball pens of which 20 are defective and others good. Nuri will buy a pen if it is good, but will not buy if it is defective. The shopkeeper draws one pen at random and gives it to her. What is the probability that

(i) She will buy it?

(ii) She will not buy it?

Answer :

Total number of possible outcomes, n(S) = 144


(i) Number of favorable outcomes, n(E) = 124



(ii) Probability of not buying a defective pen = 1 – P(E)



Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Quiz | Imp. Qs. of ProbabilityQuiz | Imp. Qs. of ProbabilityQuiz | Imp. Qs. of Probability37 mins
Let's understand ProbabilityLet's understand ProbabilityLet's understand Probability40 mins
When Chance is called ProbabilityWhen Chance is called ProbabilityWhen Chance is called Probability48 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses