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?     

(a)  

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)  

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.

(a)  

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?

(a)