Maths (statistics)

If the mean of 2,4,6,8,x,y is 5, then find the value of x+y

• 5

• 2

• 7

• 10

write the class mark of 90-110 group

• 102

• 100

• 98

• 105

If the ratio of mean and median of a certain data is 2:3, then find the ratio of its mode and mean

• 3.4

• 5.6

• 4.9

• 5.2

The following marks were obtained by students in a test.

81,72,90,90,86,85,92,70,71,83,89,95,85,79,62

What is the range?

• 33

• 45

• 23

• 56

In a histogram, each class rectangle is constructed with base as

• frequency

• class interval

• range

• size of the class

The mean of ten numbers is 20, if 5 is subtracted from every number, what will be the new mean?

• 10

• 15

• 17

• 20

Find the mean of first 10 even natural no

• 13

• 12

• 15

• 11

Find the median of 37,31,42,43,46,25,39,45,32

• 40

• 37

• 39

• 42

If the median of a series of data is 3 and mean is 2 the find the mode

• 3

• 5

• 2

• 6

If the mean of 5 observations x,x+2,x+4,x+6,x+8 is 11 find the mean of first three observation

• 8

• 5

• 7

• 9