Mathematics Standard 7 Term III>Chapter 5 - Statistics>Exercise>Q 10

EASY

7th Tamil Nadu Board

IMPORTANT

Earn 100

Find the mean of first $10$ prime numbers and first $10$ composite numbers.

Important Questions on Statistics

EASY

7th Tamil Nadu Board

IMPORTANT

Mathematics Standard 7 Term III>Chapter 5 - Statistics>Example>Q 1

The daily wages of a worker for $10$ days is as follows. Find the average income of the worker.

Days	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
Wages $(₹)$	$250$	$350$	$100$	$400$	$150$	$270$	$450$	$320$	$610$	$750$

MEDIUM

7th Tamil Nadu Board

IMPORTANT

Mathematics Standard 7 Term III>Chapter 5 - Statistics>Example>Q 2

The mean of

9

observations is

24

. Find the sum of the

9

observations.

MEDIUM

7th Tamil Nadu Board

IMPORTANT

Mathematics Standard 7 Term III>Chapter 5 - Statistics>Example>Q 3

The mean age of

15

teachers in a school is

42

. The ages of the teachers are

35, 42, 48, X, X + 8, 40, 43, 50, 46, 50, 37, 32, 38, 41, 40

(in years). Find the value of

X

and unknown ages of the two teachers?

MEDIUM

7th Tamil Nadu Board

IMPORTANT

Mathematics Standard 7 Term III>Chapter 5 - Statistics>Example>Q 4

If the mean of the following numbers is $38$ , find the value of $x$ .

$48, x, 37, 38, 36, 27, 35, 34, 38, 49, 33$ .

MEDIUM

7th Tamil Nadu Board

IMPORTANT

Mathematics Standard 7 Term III>Chapter 5 - Statistics>Example>Q 5

Find the mode of the given set of numbers.

$5, 7, 10, 12, 4, 5, 3, 10, 3, 4, 5, 7, 9, 10, 5, 12, 16, 20, 5$

MEDIUM

7th Tamil Nadu Board

IMPORTANT

Mathematics Standard 7 Term III>Chapter 5 - Statistics>Example>Q 6

The marks obtained by $11$ students of a class in a test are given below:

$23, 2, 15, 38, 21, 19, 23, 23, 26, 34, 23$

Find the mean and median.

MEDIUM

7th Tamil Nadu Board

IMPORTANT

Mathematics Standard 7 Term III>Chapter 5 - Statistics>Example>Q 7

Find the mode of the following data:

$123, 132, 145, 176, 180, 120$

MEDIUM

7th Tamil Nadu Board

IMPORTANT

Mathematics Standard 7 Term III>Chapter 5 - Statistics>Example>Q 8

Find the mode of the following data.

$14, 15, 12, 14, 16, 15, 17, 13, 16, 16, 15, 12, 16, 15, 13, 14, 15, 13, 15, 17, 15, 14, 18, 19, 12, 14, 15, 16, 15, 16, 13, 12$ .