SM025 TOPIC 6 AND 7 26/3/3024

Calculate the mean of this data

• 132.5

• 158.7

• 162.5

• 165.3

Calculate the mode of this data

• 160.77

• 147.5

• 163.43

• 172.82

Calculate the Standard Deviation of this data

• 20.85

• 21.33

• 17.32

• 19.42

Calculate Pearson’s coefficient of skewness and state the type of     distribution.

• -0.4362, positively skewed

• -6056 , negatively skewed

• -0.5808, negatively skewed

• -0.5247, negatively skewed

How many three letter words can be made from the letters of the words

KEYBOARD

• 336

• 720

• 144

• 72

A committee is to be formed with a president, a vice-president and a treasurer.

There are 10 people to be selected from.

How many different committees are possible?

• 120

• 72

• 45360

• 720

If 8 boys and 2 girls must stand in line for a picture,

how many line-up’s will have the girls separated from each other?     

How many four digit positive numbers less than 4670

can be formed using the digit 1,3,4,5,8,9 if repetitions are not allowed? 

A box contains 2 white balls, 3 black balls and 4 red balls.

In how many ways can 3 balls be drawn from the box,

if at least one black ball is to be included in the draw.

From a group of 7 men and 6 women, five persons are to

be selected to form a committee so that at least 3 men are

there on the committee. In how many ways can it be done?