The data below represents the number of t-shirts sold per week by a student who started his own online t-shirt business. find the weighted mean of the number of t-shirts sold per week. (round your answer to the nearest tenth if necessary.)
t-shirts sold per week frequency
2 1
4 4
6 7
8 3

The weighted mean of the number of t-shirts sold per week is 5.6.

Step-by-step explanation:

Given : The data below represents the number of T-shirts sold per week by a student who started his own online t-shirt business.

T-Shirt Sold per Week() Frequency()

         2                                                          1

4                                                          4

6                                                          7

8                                                          3

To find : The weighted mean of the number of t-shirts sold per week ?

Solution :

The formula of weighted mean is

Substituting the values in the formula,

Therefore, The weighted mean of the number of t-shirts sold per week is 5.6.

ad = ae + ed = y + 7

similar triangles therefor

ac/ab = ad/ae

6/4 = (y + 7) / y

cross multiply

6y = 4(y + 7)

6y = 4y + 28

2y = 28

y = 14

step-by-step explanation:

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