Question

Mon 5,229 Tues 3,598 Wed 6,055 Thurs 3,110 Fri 3,765 Sat ? The mean sales for this one week were 4,443 The manager misplaced her records for Saturday .What were the sales on Saturday. 458 a 4,901 b 4,987 c 9,344 d,how do you come up with the answer.

Answer 1

We need to find the sales on Saturday.

Mon 5,229

Tues 3,598

Wed 6,055

Thurs 3,110

Fri 3,765

Let x for Saturday sales.

The mean sales for the week were 4,443

To find the mean we add the sales together and then divide them by the total number of sales.

Mean = Sum of all the data points/ Number of data points

So we have Monday to Saturday= 6 day

Mean = 4,443

4,443 = (5,229 + 3,598 + 6,055 + 3,110 + 3,765 + x )/6

Solve the equation for x:

Multiply both sides by 6 to cancel the left division:

6*4,443 = 6* (5,229 + 3,598 + 6,055 + 3,110 + 3,765 + x )/6

26,658 = 5,229 + 3,598 + 6,055 + 3,110 + 3,765 + x

Sum the left values

26,658 = 21,757 + x

Subtract both sides by 21,757

26,658 -21,757 = 21,757 - 21,757 + x

4901 = x

The correct answer is the option b.