6 Seenal is a baker.

She buys flour in 50 kg bags.

The table shows the number of 50 kg bags of flour she used to make loaves

in each of the last 4 weeks.

week

1

2

3

4

number of bags of flour

7

14

00

13

Seenal will make 2400 loaves in week 5

Each of these loaves will need 250 g of flour.

Seenal works out the weekly mean number of 50 kg bags of flour used in these 5 weeks.

She will use this figure for future orders.

(a) Work out the weekly mean number of 50 kg bags of flour used in these 5 weeks.

(5)

Weekly mean number of bags used = 9.2 bags

Step-by-step explanation:

Seenal makes 2400 loaves in week 5

Quantity of flour used for 1 loaf = 250 g = 0.25 kg

Quantity of flour used for 2400 loaves = 0.25 * 2400 = 600 kg

Number of 50 kg bags of flour bought in week 5 = 600/50 = 12 bags

Therefore, the summary of the number of bags used in each week is:

Week 1 = 7 bags

Week 2 = 14 bags

Week 3 = 0 bags

Week 4 = 13 bags

Week 5 = 12 bags

Weekly mean number of 50 kg bags of flour used in the 5 weeks = (7+14+0+13+12) / 5

Weekly mean number of bags used = 46/5 = 9.2 bags