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Gnoma [55]
3 years ago
5

A friend has a 85% average before the final exam for a course. That score includes everything but the final, which counts for 15

% of the course grade. What is the best course grade your friend can earn?
Mathematics
2 answers:
Arlecino [84]3 years ago
7 0

Answer:

87.25%

Step-by-step explanation:

Data given in the question

Before the final exam for a course, the average percentage is 85%

The counting percentage of the course grade is 15%

So by considering the above information, the best course grade your friend is

= Average\ percentage\times remaining\ percentage + percentage\ value\times counting\ percentage= 0.85\times 0.85 + 100\%\times  0.15

= 0.7225 + 15

= 87.25%

The remaining percentage is come from

= 100% - 15%

= 85%

Hence, the best course grade is 87.25%

Svetllana [295]3 years ago
7 0

Answer:

Best course grade that can be earned = 87.25%

Step-by-step explanation:

Let the total number of marks of the exam be = 100

Exam portion conducted until now is except 15% , it means  remaining 85% test has been conducted & evaluated

  • Test Conducted, Evaluated : 85% of 100 = (85 / 100) x 100 → = 85

Score out of conducted (85% test) is 85%  : 85% of 85

= [ 85 / 100 ] x 85 → 72.25

  • Test Remaining : 15% of 100 = 15

Maximum score attainable out of 15 = 15

  • Hence : Best earn-able grade =

Grade earned out of 85% test done + Best grade attainable out of remaining 15% test

= 72.25 +15 = 87.5

Best earn-able grade in percentage = (Marks obtained / Total Marks)x 100

= ( 87.5 / 100 )  → = 87.25 %

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Answer:

The answer is 80.

Step-by-step explanation:

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mixas84 [53]

Answer:

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Step-by-step explanation:

let w represent white water bottles, and let b represent black water bottles.

set up a system of equations:

w+b=20

w+2b=35

(the top equation shows that the number of white water bottles he sold and the number of black water bottles he sold equals to 20, since it says that the total number of water bottles is 20. the bottom equation shows that white water bottles cost $1, and black water bottles cost $2, and that the total amount of money he got from selling them is $35).

in the top equation, isolate w:

w+b=20

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now we do substitution. in the bottom equation, substitute 20-b for w:

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Step-by-step explanation:

Given,

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