Which of the following is NOT a type of average?

The mean of six number is 15. If five of those numbers are 10, 12, 15, 16 and 17, the remaining number is

If the mean of the four numbers 2, 4,  $\chi$  , and 6 is 5, then  $\chi$   is

A company employs 10 workers at $3500 per month and 5 clerks at $2000 per month. What is the mean monthly wage of the 15 employees?

Questions 9 - 11 refer to the information below, which shows the raw data of scores obtained by 20 students in a test.

2 6 4 5 4

4 5 8 2 6

5 4 2 5 3

4 5 6 3 5

Which of the frequency tables below, represent the above information?

[Hint: Do your own frequency table in your book and see which on matches]

What is the mean score?

[Hint: Use the correct frequency table from the previous question and multiple scores by frequency and add them up and  $\div$   by the total frequency.]

What is the modal score?

[Hint: Using the correct frequency table from question 9.]

The marks of ten students in an MCQ test were:

17, 13, 14, 19, 18, 17, 15, 9, 15.

What is the modal mark?

How many students took the test?

What is the modal mark?

If the pass mark was 3, how many students passed the test?

How many boys prefer tennis?

How many boys prefer cricket?