Sum of the items in set of data Mean =
number of items in set of data
Range = Biggest data value - smallest data value.
The marks for 10 learners in the gr. 9 Mathematics test were as follow:
45
36 81 20 77 18 54 48 51 36
3.1
Arrange the marks in ascending order
3.2
Calculate the mean mark (percentage) for the 10 learners correct to one decimal.
3.3 Determine the range of marks
3.4
Determine the mode.
3.5 The mean of the following 3 marks is 20
24 A 21
Determine the value of A​

Below in bold.

Step-by-step explanation:

3.1.

In ascending order:

18 20 36 36 45 48 51 54 77 81

3.2

Mean =sum / 10 =

466/10

= 46.6.

Range = 81 - 18 = 63.

3.4

Mode = 36.  ( mode is most frequent occurring mark)

3.5.

24 + A + 21 = 3* 20

A = 60 - 24 - 21

= 15.

the person above is correct just to confirm

Step-by-step explanation:

hope this helps!

have a good day :)

y = 2x

step-by-step explanation:

if you divide each number in the sequence, you'll see that they all have a multiple factor of 2. each number in the series, and any other numbers which may continue, will be multiplied by 2. therefore, y is the next number in the sequence, and x is the current one, so, our formula will be y = 2x.

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