Q. 335.0( 2 Votes )

# A box contains 90 discs, numbered from 1 to 90. If one disc is drawn at random from the box, the probability that it bears a prime number less than 23, isA. B. C. D.

Answer :

Total numbers of elementary events are: 90

Let E be the event of drawing prime number less than 23

Favorable outcomes are: 2, 3, 5, 7, 11, 13, 17, 19

Numbers of favorable outcomes are: 8

P (prime number less than 23) = P (E) = 8/90 = 4/45

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Smart Revision | Quiz on Probability37 mins
NCERT | How Probability Can Help You Score Marks?44 mins
Quiz | Imp. Qs. of Probability37 mins
Introduction to Probability53 mins
NCERT | Quiz on Probability47 mins
Solve RD Sharma Problems 2x Faster30 mins
Let's understand Probability40 mins
When 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
view all courses