Question

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)

Answer 1

Weekly mean number of bags used = 9.2 bags

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