(A) Total number of pens $= 12 + 132 = 144$.Total number of good pens $= 132$.The probability $P$ of an event is given by the formula:$P(\text{event})

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

(A) Total number of pens $= 12 + 132 = 144$.Total number of good pens $= 132$.The probability $P$ of an event is given by the formula:$P(\text{event}) = \frac{\text{Number of favourable outcomes}}{\text{Total number of possible outcomes}}$.Therefore,the probability of getting a good pen is:$P(\text{good pen}) = \frac{132}{144}$.Dividing both the numerator and the denominator by $12$,we get:$P(\text{good pen}) = \frac{11}{12}$.

Class 10 Mathematics Probability Textbook - Probability

Easy

$12$ defective pens are accidentally mixed with $132$ good ones. It is not possible to just look at a pen and tell whether or not it is defective. One pen is taken out at random from this lot. Determine the probability that the pen taken out is a good one.

A
$11/12$
B
$1/12$
C
$12/132$
D
$132/144$

Explore More

Browse All

Question Bank

All Subjects

Class 10 Questions

Class 10

Mathematics Questions

Chapter

Probability

Subtopic

Textbook - Probability

$A$ bag contains a red ball,a blue ball and a yellow ball,all the balls being of the same size. Kritika takes out a ball from the bag without looking into it. What is the probability that she takes out the
$(i)$ yellow ball?
$(ii)$ red ball?
$(iii)$ blue ball?

Easy

View Solution

Complete the following statements:
$(i)$ The sum of the probabilities of all the elementary events of an experiment is .......
$(ii)$ The probability of an event is greater than or equal to ....... and less than or equal to .......

Easy

View Solution

Suppose we throw a die once. $(i)$ What is the probability of getting a number greater than $4$? $(ii)$ What is the probability of getting a number less than or equal to $4$?

Easy

View Solution

$A$ game consists of tossing a one rupee coin $3$ times and noting its outcome each time. Hanif wins if all the tosses give the same result,i.e.,three heads or three tails,and loses otherwise. Calculate the probability that Hanif will lose the game.

Medium

View Solution

$A$ box contains $3$ blue,$2$ white,and $4$ red marbles. If a marble is drawn at random from the box,what is the probability that it will be
$(i)$ white?
$(ii)$ blue?
$(iii)$ red?

Difficult

View Solution

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial

For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free

For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo

$12$ defective pens are accidentally mixed with $132$ good ones. It is not possible to just look at a pen and tell whether or not it is defective. One pen is taken out at random from this lot. Determine the probability that the pen taken out is a good one.

Similar Questions

$A$ bag contains a red ball,a blue ball and a yellow ball,all the balls being of the same size. Kritika takes out a ball from the bag without looking into it. What is the probability that she takes out the$(i)$ yellow ball?$(ii)$ red ball?$(iii)$ blue ball?

Complete the following statements:$(i)$ The sum of the probabilities of all the elementary events of an experiment is .......$(ii)$ The probability of an event is greater than or equal to ....... and less than or equal to .......

Suppose we throw a die once. $(i)$ What is the probability of getting a number greater than $4$? $(ii)$ What is the probability of getting a number less than or equal to $4$?

$A$ game consists of tossing a one rupee coin $3$ times and noting its outcome each time. Hanif wins if all the tosses give the same result,i.e.,three heads or three tails,and loses otherwise. Calculate the probability that Hanif will lose the game.

$A$ box contains $3$ blue,$2$ white,and $4$ red marbles. If a marble is drawn at random from the box,what is the probability that it will be$(i)$ white?$(ii)$ blue?$(iii)$ red?

Vedclass Test Series

Exam Paper Generator

Online Exam Module

$A$ bag contains a red ball,a blue ball and a yellow ball,all the balls being of the same size. Kritika takes out a ball from the bag without looking into it. What is the probability that she takes out the
$(i)$ yellow ball?
$(ii)$ red ball?
$(iii)$ blue ball?

Complete the following statements:
$(i)$ The sum of the probabilities of all the elementary events of an experiment is .......
$(ii)$ The probability of an event is greater than or equal to ....... and less than or equal to .......

$A$ box contains $3$ blue,$2$ white,and $4$ red marbles. If a marble is drawn at random from the box,what is the probability that it will be
$(i)$ white?
$(ii)$ blue?
$(iii)$ red?