71 x 0.85 = 60.35
60 x 0.15 = 9.00
Your grade is 60.35 + 9.00 = 69.35.
85% of your grade is a 68 and 15% is zero. 0.85 x 68 + 0.15 x 0 = 58, your final grade.
7.5 is 15% of 50.
You have what's known as a weighted average. The 80 score is weighted more heavily than the 91 score, so the weighted average will be closer to 80 than a non-weighted average. 0.85 x 80 = 68 0.15 x 91 = 13.65 68 + 13.65 = 81.65
The final price of the item, including the discount and sales tax, is: $73.44
If you get one wrong out of 15 questions, your grade would depend on how the grading scale is set up. If each question is worth the same amount of points, you would have a score of 14/15, which usually translates to a high grade such as an A or A+. However, if the grading scale deducts a fixed amount of points for each incorrect answer, it would depend on the specific grading scale to determine the grade.
71.4 84*.85+0*.15=71.4
85% of your grade is a 68 and 15% is zero. 0.85 x 68 + 0.15 x 0 = 58, your final grade.
You do not even need to get a 30% on the final. If you have a 100% in the class and get a 0% on the final, you willl still have an 85% in the class.
15 out of 20 would be grade of 75 percent.
7.5 is 15% of 50.
Take your number and multiply by .85
.5985 (final total after discount: 3.3915)
Exactly 53.33333333% (53.33) percent. As a grade, it is an F
You have what's known as a weighted average. The 80 score is weighted more heavily than the 91 score, so the weighted average will be closer to 80 than a non-weighted average. 0.85 x 80 = 68 0.15 x 91 = 13.65 68 + 13.65 = 81.65
The final price of the item, including the discount and sales tax, is: $73.44
This is a savings of $10.50 so your final cost would be $59.50.
That all depends on what you want the final concentration of alcohol to be.