ZA= 6x - 2
B = 4x +48
A
B

(a) The difference is 5

(b) No mode

(c)

Step-by-step explanation:

Given

The above data

Solving (a): Difference in their range

Range is calculated as:

For last year:

For 2 years ago

The difference is:

Solving (b): The modal of last year

This is the entry with the highest frequency

From "last year" data, each of the entry has a frequency of 1.

This implies that there is no mode

Solving (c): Median of last 2 years

First, arrange in ascending order

The median is then calculated as:

This means that we calculate the average of the 6th and 7th entry