Q1.

The median of the data 13, 8, 11, 6, 4, 15, 2, 18, is : 

  • 5

  • 8

  • 11

  • 9.5

Solution:

NA

Q2.

Extreme values have  __________ effect on mode : 

  • high

  • low 

  • no

  • none of these

Solution:

NA

Q3.

The median of x,\({x \over 2}\), \({x \over 3}\), \({x \over 5}\) is 10 .

Find x where x > 0

  • 24

  • 32

  • 16

  • 8

Solution:

NA

Q4.

The average salary of 50 men was Rs. 80 but it was found that salary of 2 of them were Rs. 46 and Rs. 28 which was wrongly taken as Rs. 64 and Rs. 82 the revised average salary is :

  • Rs. 80 

  • Rs. 78.56

  • Rs. 85.26

  • Rs. 82.92

Solution:

 NA

Q5.

When mean is 3.57 and mode is 2.13 then the value of median is _________ . 

  • 3.09

  • 5.01

  • 4.01

  • none of these 

Solution:

NA

Q6.

The mean weight of 15 students is 110 kg the mean weight of 5 of them is 100 kg one of  another five students is 125 kg. Then the mean weight of remaining students is  

  • 105

  • 100

  • 102

  • 110

Solution:

NA

Q7.

If the difference between mean and mode is 63, then the difference mean and median will be ________ . 

  • 63

  • 31.5

  • 21

  • None of these 

Solution:

NA

Q8.

The median of following numbers , which are given is ascending order is 25. Find the value of x.

11  13  15  19   (x + 2)   (x + 4)

30  35   39   46   

  • 22

  • 20

  • 15

  • 30

Solution:

NA

Q9.

The mean of first three term is 14 and the mean of next two term is 18. The mean of all five term is :

  • 14.5

  • 15

  • 14

  • 15.6

Solution:

NA

Q10.

The mean salary of group of 50 persons is Rs. 5,850. Later on it is discovered that the salary of one employee has been wrongly taken as Rs. 8,000 instead of Rs. 7,800 . The corrected mean salary is 

  • Rs. 5,854

  • Rs. 5,846

  • Rs. 5,650

  • None of these 

Solution:

NA

Q11.

The average age of 15 students of a class is 15 years. Out of them, the average age of 5 students is 14 years and that of the other 9 students is 16 years. The age of the 15th student is 

  • 11 years 

  • 15 years 

  • 13 years 

  • None of these 

Solution:

NA

Q12.

The price of averages whose value can be determined graphically ?

  • Mode, Median

  • Mean, Mode 

  • Mean, Median 

  • None of these 

Solution:

NA

Q13.

In a class of 50 students , 10 have failed and their averages marks in 2.5 . The total marks secured by the entire class were 281 . The average marks who have passed is : 

  • 5.32

  • 7.25

  • 6.40

  • None of the above 

Solution:

NA

Q14.

Which one of the following is not the measurement of central tendency.

  • Range

  • Median

  • Mode

  • Mean

Solution:

NA

Q15.

The intersection point of both the ogive curve gives us 

  • Mode

  • Median

  • Mean

  • Quartile deviation

Solution:

NA

Q16.

Mode can be determined graphically with the help of 

  • Ogive curve

  • Cumulative frequency curve

  • Histogram

  • Frequency polygon

Solution:

NA

Q17.

If the mean of 'n' observations is  'A', if the first item is increased by 1, second by 2, third by 3 and so on. Find the new mean. 

  • A + n

  • A - n

  • A  + n /2

  • A + (n + 1)/2

Solution:

NA

Q18.

The mean of 98 observations is 45, if each observation is added by 9. Find the new mean.

  • 54

  • 45

  • 9

  • 60

Solution:

NA

Q19.

The mean of observations x1,  x2,   x3,.....xn is M, then the mean of ax1,   ax2,   ax3,.........axn  is

  • a

  • M

  • aM

  • M/a

Solution:

NA

Q20.

If the mean of first n natural numbers is 6n/11, find n

  • 9

  • 10

  • 12

  • 11

Solution:

NA

Q21.

If the following numbers are arranged in ascending order. Their mean and median are same. Find the value of x and mean.

5,  6, x + 1,  x + 3,  x + 4, 12, 18

  • 7,  14

  • 7,  10

  • 7,    7

  • 9, 10

Solution:

NA

Q22.

Histogram can be draw for unequal class intervals, using frequency density in the place of frequency

  • true

  • false

  • can't say

  • none of these

Solution:

NA

Q23.

If the difference of mode and median of the data is 36, then what will be the difference between median and mean.

  • 9

  • 18

  • 29

  • 36

Solution:

NA

Q24.

If the difference between mean and median is 9 then find the difference between mean and mode.

  • 27

  • 12

  • 45

  • 6

Solution:

NA

Q25.

The mean of first n natural number is 10.5, then find n.

  • 20

  • 18

  • 16

  • 25

Solution:

NA

Q26.

The mean of first 'n' even natural number is 11, find n.

  • 9

  • 10

  • 11

  • 12

Solution:

NA