To know the opinion of the students about the subject statistics, a survey of 200 students was conducted. The data is recorded in the following table:

Opinion

Number of students

like

dislike

135

65

Find the probability that a student chosen at random
(i) likes statistics,
(ii) does not like it.

Solution

Total number of students = 200

(i) Number of students who like statistics = 135 Probability that a student chosen at random like statistics = $135 over 200 equals 27 over 40$

(ii) Number of students who do not like statistics = 65
Probabi lity that a student chosen at random does not like it = $65 over 200 equals 13 over 40.$

Aliter: Probability that a student chosen at andom does like statistics

= 1 – probability that a student chosen at random likes statistics
$equals 1 minus 27 over 40 equals 13 over 40.$

Some More Questions From Introduction to Mathematical Modelling Chapter

Activity: Note the frequency of two wheelers, three wheelers and four wheelers going past during a time interval, in front of your school gate. Find the probability that any one vehicle out of the total vehicles you have observed is a two-wheeler.

Activity: Ask all the students in your class to write a 3-digit number. Choose any student from the room at random. What is the probability that the number written by her/him is divisible by 3 ? Remember that a number is divisible by 3, if the sum of its digits is divisible by 3.

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Introduction To Mathematical Modelling

Some More Questions From Introduction to Mathematical Modelling Chapter

Activity: Note the frequency of two wheelers, three wheelers and four wheelers going past during a time interval, in front of your school gate. Find the probability that any one vehicle out of the total vehicles you have observed is a two-wheeler.

Activity: Ask all the students in your class to write a 3-digit number. Choose any student from the room at random. What is the probability that the number written by her/him is divisible by 3 ? Remember that a number is divisible by 3, if the sum of its digits is divisible by 3.

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For Daily Free Study Material Join wiredfaculty

Introduction To Mathematical Modelling

To know the opinion of the students about the subject statistics, a survey of 200 students was conducted. The data is recorded in the following table: Opinion Number of students like dislike 135 65 Find the probability that a student chosen at random(i) likes statistics,(ii) does not like it.

Some More Questions From Introduction to Mathematical Modelling Chapter

Activity: Note the frequency of two wheelers, three wheelers and four wheelers going past during a time interval, in front of your school gate. Find the probability that any one vehicle out of the total vehicles you have observed is a two-wheeler.

Activity: Ask all the students in your class to write a 3-digit number. Choose any student from the room at random. What is the probability that the number written by her/him is divisible by 3 ? Remember that a number is divisible by 3, if the sum of its digits is divisible by 3.

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation