Step by Step Mathematics>Chapter 16 - Data Handling>EXERCISE 16.2>Q 4

HARD

7th CBSE

IMPORTANT

Earn 100

The mean of $10$ observations is $35$ . If one observation $32$ was mis-read as $23$ , find new mean.

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Important Questions on Data Handling

MEDIUM

7th CBSE

IMPORTANT

Step by Step Mathematics>Chapter 16 - Data Handling>EXERCISE 16.2>Q 5

Find the arithmetic mean of all even numbers between

89

and

101

.

HARD

7th CBSE

IMPORTANT

Step by Step Mathematics>Chapter 16 - Data Handling>EXERCISE 16.2>Q 6

The mean of

50

observations was

250

. Later it was found out that the number

152

was wrongly copied as

102

for the computation of mean. Find the correct mean.

MEDIUM

7th CBSE

IMPORTANT

Step by Step Mathematics>Chapter 16 - Data Handling>EXERCISE 16.2>Q 7

Find the mean of all factors of

12

HARD

7th CBSE

IMPORTANT

Step by Step Mathematics>Chapter 16 - Data Handling>EXERCISE 16.2>Q 8

A cricketer has a mean score of

45

in

8

innings. How many runs are to be scored in the

9

th innings to raise

50

.

MEDIUM

7th CBSE

IMPORTANT

Step by Step Mathematics>Chapter 16 - Data Handling>EXERCISE 16.2>Q 9

The mean of

26, 14, x, 25, 15, 13, 27, 18 is 18.75

. Find the value of

x

HARD

7th CBSE

IMPORTANT

Step by Step Mathematics>Chapter 16 - Data Handling>EXERCISE 16.2>Q 10

The mean of six numbers is

30

. If one number is excluded, the mean is

29

. Find the excluded number.

HARD

7th CBSE

IMPORTANT

Step by Step Mathematics>Chapter 16 - Data Handling>EXERCISE 16.2>Q 11

The mean of

45

numbers is

25

. If each number is multiplied by

3

, find the new mean.

MEDIUM

7th CBSE

IMPORTANT

Step by Step Mathematics>Chapter 16 - Data Handling>EXERCISE 16.2>Q 12

The daily temperature recorded in

{}^{\circ}C

at Delhi during the first week of May,

2015

is as under:

42, 42.5, 40.5, 41, 43.5, 40.5, 44

. Find the mean temperature recorded.