Question

QUESTION 6Emily has enrolled in a first year math class. The course has 5 assignments each worth 2%, 3 tests worth 20% and 2 tests worth 15%. Emily thus far has completed 3 assignments scoring: 72%, 84%, and 58%. In addition to the assignments, Emily has completed 2 tests: Test 1 (worth 20%) she scored 85% and Test 2 she scored 68% (worth 15%). What is Emily's current grade? Keep the answer in percent and round to the tenth if necessary. Do not input the percent (%) into the answer.

Answer 1

76.8

Explanation:

Given:

3 Assignments (2%)

1. 72%

2. 84%

3. 58%

1 Test (20%)

85%

1 Test (15%)

68%

We can calculate Emily's current grade using the weighted average principle, just like this:

`p=\frac{\sum ^{}_{}x_i\cdot w_i}{\sum ^{}_{}w_i}`

In this case, the value of x are the scores and w are the percentages associated with that value, we replace:

`\begin{gathered} g=g=(72\cdot2\%+84\cdot2\%+58\cdot2\%+85\cdot20\%+68\cdot15\%)/(2\%+2\%+2\%+20\%+15\%) \\ g=(72\cdot0.02+84\cdot0.02+58\cdot0.02+85\cdot0.2+68\cdot0.15)/(0.02+0.02+0.02+0.2+0.15) \\ g=(31.48)/(0.41) \\ g=76.78 \\ g\cong76.8\% \end{gathered}`

Therefore, Emily's current grade is 76.8%.