Assessment 3

A box contains 20 counters, numbered 1 to 20. If one counter is selected at random, work out the probability that the number is less than 12.

(a)  

The probability that Kamui’s train is late is 0.05. Work out the probability that his train is not late.

(a)  

A bag contains red, green, blue and white counters. This table shows the probabilities of randomly selecting a red, green or white counter from the bag. Work out the probability of selecting a blue counter.

(a)  

Use this diagram showing 12 pupils’ test marks to find:

a) the modal mark

(a)  

Use this diagram showing 12 pupils’ test marks to find:

b) the median mark

(a)  

Use this diagram showing 12 pupils’ test marks to find:

c) the number of marks above 60

(a)  

20 customers each gave a restaurant a mark out of 10. Their marks are shown below. Find

a) the modal mark,

(a)  

20 customers each gave a restaurant a mark out of 10. Their marks are shown below. Find b) the median mark,

(a)  

20 customers each gave a restaurant a mark out of 10. Their marks are shown below. Find c) the mean mark,

(a)  

20 customers each gave a restaurant a mark out of 10. Their marks are shown below. Find d) the range.

(a)