Q. 10 A4.4( 5 Votes )

A box contains 90 discs which are numbered from 1 to 90. If one disc is selected at random from the box, find the probability that it bears.

a two- digit number

Answer :

Given,

There are 90 discs in a box.


Number of outcomes in which discs is selected = 90.


Discs are numbered from 1 to 90.


total 2 digits numbers = 90 – 9 ( 1 to 9 will be one digit numbers)


Total 2 digits numbers = 81


favourable outcomes = 81


Probability that discs bears a two- digit number –


P(two digit numbers) =


P(two digit numbers) =


P(two digit numbers) =


Probability that disc bears two digit number is


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 Probability37 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