A die is rolled 25 times and outcomes are recorded as under:

Outcomes

Frequency

1

9

2

4

3

5

4

6

5

1

6

0

It is thrown one more time. Find the probability of getting

(a) an even number
(b) a multiple of 3
(c) a prime number.

Solution

Total number of times a die is rolled = 25
(a) Even numbers are 2,4, 6.
∴ Probability of getting an even number
$equals fraction numerator 4 plus 6 plus 0 over denominator 25 end fraction equals 10 over 25 equals 2 over 5$

(b) Multiples of 3 are 3, 6.
∴ Probability of getting a multiple of 3
$equals fraction numerator 5 plus 0 over denominator 25 end fraction equals 5 over 25 equals 1 fifth$

(c) 2, 3, 5 are prime numbers.
∴ Probability of getting a prime number
$equals fraction numerator 4 plus 5 plus 1 over denominator 25 end fraction equals 10 over 25 equals 2 over 5.$

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.

For Daily Free Study Material Join wiredfaculty

Introduction To Mathematical Modelling

A die is rolled 25 times and outcomes are recorded as under:

Outcomes

Frequency

1

9

2

4

3

5

4

6

5

1

6

0

It is thrown one more time. Find the probability of getting

(a) an even number
(b) a multiple of 3
(c) a prime number.

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

Phone Number

Email Address

Loaction

For Daily Free Study Material Join wiredfaculty

Introduction To Mathematical Modelling

A die is rolled 25 times and outcomes are recorded as under: Outcomes Frequency 1 9 2 4 3 5 4 6 5 1 6 0 It is thrown one more time. Find the probability of getting (a) an even number(b) a multiple of 3(c) a prime number.

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

A die is rolled 25 times and outcomes are recorded as under:

Outcomes

Frequency

1

9

2

4

3

5

4

6

5

1

6

0

It is thrown one more time. Find the probability of getting

(a) an even number
(b) a multiple of 3
(c) a prime number.