Jaclin

Asked: November 4, 2020In: Class 9

Twenty-seven solid iron spheres, each of radius r and surface area S are melted to form a sphere with surface area S′. Find the:

NCERT Solutions for Class 9 Maths Chapter 13 Important NCERT Questions Surface Areas and Volumes NCERT Books for Session 2022-2023 CBSE Board, UP Board and Other state Boards EXERCISE 13.8 Page No:236 Questions No:9 (i) radius r ′ of the new ...

Kavita Kaushik

Asked: November 4, 2020In: Class 9

A capsule of medicine is in the shape of a sphere of diameter 3.5 mm. How much medicine (in mm³) is needed to fill this capsule?

NCERT Solutions for Class 9 Maths Chapter 13 Important NCERT Questions Surface Areas and Volumes NCERT Books for Session 2022-2023 CBSE Board, UP Board and Other state Boards EXERCISE 13.8 Page No:236 Questions No:10

Kavita Kaushik

Asked: November 4, 2020In: Class 9

The diameter of a sphere is decreased by 25%. By what per cent does its curved surface area decrease?

NCERT Solutions for Class 9 Maths Chapter 13 Important NCERT Questions Surface Areas and Volumes NCERT Books for Session 2022-2023 CBSE Board, UP Board and Other state Boards EXERCISE 13.9 Page No:237 Questions No:3

Kiran Chaudhary

Asked: November 4, 2020In: Class 9

The following number of goals were scored by a team in a series of 10 matches: 2, 3, 4, 5, 0, 1, 3, 3, 4, 3 Find the mean, median and mode of these scores.

NCERT Solutions for Class 9 Maths Chapter 13 Important NCERT Questions Statistics NCERT Books for Session 2022-2023 CBSE Board, UP Board and Other state Boards EXERCISE 14.4 Page No:269 Questions No:1

Kiran Chaudhary

Asked: November 4, 2020In: Class 9

In a mathematics test given to 15 students, the following marks (out of 100) are recorded: 41, 39, 48, 52, 46, 62, 54, 40, 96, 52, 98, 40, 42, 52, 60 Find the mean, median and mode of this data.

NCERT Solutions for Class 9 Maths Chapter 13 Important NCERT Questions Statistics NCERT Books for Session 2022-2023 CBSE Board, UP Board and Other state Boards EXERCISE 14.4 Page No:269 Questions No:2

Kiran Chaudhary

Asked: November 4, 2020In: Class 9

The following observations have been arranged in ascending order. If the median of the data is 63, find the value of x. 29, 32, 48, 50, x, x + 2, 72, 78, 84, 95.

NCERT Solutions for Class 9 Maths Chapter 13 Important NCERT Questions Statistics NCERT Books for Session 2022-2023 CBSE Board, UP Board and Other state Boards EXERCISE 14.4 Page No:269 Questions No:3

Kiran Chaudhary

Asked: November 4, 2020In: Class 9

Find the mode of 14, 25, 14, 28, 18, 17, 18, 14, 23, 22, 14, 18.

NCERT Solutions for Class 9 Maths Chapter 14 Important NCERT Questions Statistics NCERT Books for Session 2022-2023 CBSE Board, UP Board and Other state Boards EXERCISE 14.4 Page No:269 Questions No:4

Geeta Kapoor

Asked: November 4, 2020In: Class 9

In a cricket match, a batswoman hits a boundary 6 times out of 30 balls she plays. Find the probability that she did not hit a boundary.

NCERT Solutions for Class 9 Maths Chapter 15 Important NCERT Questions Probability NCERT Books for Session 2022-2023 CBSE Board, UP Board and Other state Boards EXERCISE 15.1 Page No:283 Questions No:1

Geeta Kapoor

Asked: November 4, 2020In: Class 9

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.

NCERT Solutions for Class 9 Maths Chapter 15 Important NCERT Questions Probability NCERT Books for Session 2022-2023 CBSE Board, UP Board and Other state Boards EXERCISE 15.1 Page No:285 Questions No:9

Geeta Kapoor

Asked: November 4, 2020In: Class 9

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.

NCERT Solutions for Class 9 Maths Chapter 15 Important NCERT Questions Probability NCERT Books for Session 2022-2023 CBSE Board, UP Board and Other state Boards EXERCISE 15.1 Page No:285 Questions No:10

Jaclin

Twenty-seven solid iron spheres, each of radius r and surface area S are melted to form a sphere with surface area S′. Find the:

A capsule of medicine is in the shape of a sphere of diameter 3.5 mm. How much medicine (in mm³) is needed to fill this capsule?

The diameter of a sphere is decreased by 25%. By what per cent does its curved surface area decrease?

The following number of goals were scored by a team in a series of 10 matches: 2, 3, 4, 5, 0, 1, 3, 3, 4, 3 Find the mean, median and mode of these scores.

In a mathematics test given to 15 students, the following marks (out of 100) are recorded: 41, 39, 48, 52, 46, 62, 54, 40, 96, 52, 98, 40, 42, 52, 60 Find the mean, median and mode of this data.

The following observations have been arranged in ascending order. If the median of the data is 63, find the value of x. 29, 32, 48, 50, x, x + 2, 72, 78, 84, 95.

Find the mode of 14, 25, 14, 28, 18, 17, 18, 14, 23, 22, 14, 18.

In a cricket match, a batswoman hits a boundary 6 times out of 30 balls she plays. Find the probability that she did not hit a boundary.

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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