Mean Median Mode

If the mean of fi ve observations x, x + 2, x + 4, x + 6 and x + 8 is 11 then

the value of x is

• 5

• 6

• 7

• 8

If the mean of x, x + 3, x + 5, x +7, x +10 is 9, the mean of the last three

observations is

• -1

• 0

• 1

• n-1

If each observation of the data is decreased by 8 then their mean

• remains the same

• is decreased by 8

• is increased by 5

• becomes 8 times the original mean

The mean weight of six boys in a group is 48 kg. The individual weights

of fi ve of them are 51 kg, 45 kg, 49 kg, 46 kg and 44 kg. The weight of

the 6th boy is

• 52 kg

• 52.8 kg

• 53 kg

• 47 kg

The mean of the marks scored by 50 students was found to be 39. Later

on it was discovered that a score of 43 was misread as 23. The correct

mean is

• 38.6

• 39.4

• 39.8

• 39.2

The mean of 100 items was found to be 64. Later on it was discovered that

two items were misread as 26 and 9 instead of 36 and 90 respectively.

The correct mean is

• 64.86

• 65.31

• 64.91

• 64.61

The mean of 100 observations is 50. If one of the observations 50 is

replaced by 150, the resulting mean will be

• 50.5

• 51

• 51.5

• 52

The runs scored by 11 members of a cricket team are 15, 34, 56, 27, 43, 29, 31, 13, 50, 20, 0. The median score is

• 27

• 29

• 31

• 20