MATHEMATICS>Chapter 14 - Statistics>EXERCISE>Q 1

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Find the mean of first six prime numbers.

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Important Questions on Statistics

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IMPORTANT

MATHEMATICS>Chapter 14 - Statistics>EXERCISE>Q 2

Find the mean of first five multiples of

5

.

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MATHEMATICS>Chapter 14 - Statistics>EXERCISE>Q 3

If the mean of

6, 8, m, 9, 14

is

10

. Find the value of

m

.

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9th CBSE

IMPORTANT

MATHEMATICS>Chapter 14 - Statistics>EXERCISE>Q 4

If the mean of

9, 6, 5, x, x - 2, 10, 12

is

8

, find the value of

x

.

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MATHEMATICS>Chapter 14 - Statistics>EXERCISE>Q 5

Find the mean of the given data.

Class interval	$10 ‐ 25$	$25 ‐ 40$	$40 ‐ 55$	$55 ‐ 70$	$70 ‐ 85$	$85 ‐ 100$
Number of students	$2$	$3$	$7$	$6$	$6$	$6$

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IMPORTANT

MATHEMATICS>Chapter 14 - Statistics>EXERCISE>Q 6

Find the mean of the following data.

Marks	$10$	$11$	$12$	$13$	$14$	$15$
Number of students	$6$	$3$	$4$	$5$	$7$	$5$

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MATHEMATICS>Chapter 14 - Statistics>EXERCISE>Q 7

The scores of two batsman $A$ and $B$ in $5$ innings of a test series are as follows:

$A$	$58$	$59$	$60$	$65$	$40$
$B$	$120$	$80$	$30$	$65$	$12$

On the basis of their average score determine who of the two may be a better choice for the man of the series?

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IMPORTANT

MATHEMATICS>Chapter 14 - Statistics>EXERCISE>Q 8

Find the mean of the following distribution.

$x$	$10$	$30$	$50$	$70$	$89$
$f$	$7$	$8$	$10$	$15$	$10$

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9th CBSE

IMPORTANT

MATHEMATICS>Chapter 14 - Statistics>EXERCISE>Q 9

If the mean of the following data is $20.2$ , find the value of $p$ .

$x$	$10$	$15$	$20$	$25$	$30$
$f$	$6$	$8$	$p$	$10$	$6$