Home
Class 9
MATHS
The mean of 8 numbers is 15. If each num...

The mean of 8 numbers is 15. If each number is multiplied by 2, then the new mean will be …………….. .

A

7.5

B

30

C

10

D

25

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • STATISTICS

    FULL MARKS|Exercise ADDITIONAL QUESTION (Answer the following question)|5 Videos

  • STATISTICS

    FULL MARKS|Exercise Assignment (Answer the following question)|10 Videos

  • STATISTICS

    FULL MARKS|Exercise Exercise 8.4|10 Videos

  • SET LANGUAGE

    FULL MARKS|Exercise Assignment (III. Answer the following questions.)|15 Videos

  • TRIGONOMETRY

    FULL MARKS|Exercise ASSIGNMENT II (ANSWER THE FOLLOWING QUESTIONS):|7 Videos

Similar Questions

Explore conceptually related problems

The mean of 12 numbers is 20, if each number is multiplied by 6, then the new mean is …………….. .

The mean of a set of numbers is X. If each number is multiplied by z, the mean is

The mean of a set of numbers is X, If each number is multiplied by z, the mean is

The mean of 30 numbers is 16, If each number is divided by 4, then the new mean is ……………….. .

The mean of a set of numbers is overline(X) . If each number is divided by 3, then the new mean is

The standard deviation of a data is 5. If each value is multiplied by 2, then the new variance is

The variance of 20 observations is 5. If each observation is multiplied by 2, find the new variance of the resulting observations.

Statement 1: If the arithmetic mean of two numbers is 5/2 geometric mean of the numbers is 2, then the harmonic mean will be 8/5. Statement 2: For a group of positive numbers (GdotMdot)^2=(AdotMdot)(HdotMdot)dot