Four friends are told that the average (mean) of their grades for their favorite class is 83.75%.

Mathematics

2 answers:

taurus [48]3 years ago

8 0

Answer:

Step-by-step explanation:

The sum of the 4 grades equals 4 times the average

94 + 78 + 83 + T = 4 * 83.75

94 + 78 + 83 + T = 335

255 + T = 335

Subtract 255 from both sides

T = 80

MrMuchimi3 years ago

6 0

Answer:

Tyler got 80%.

Step-by-step explanation:

Represent Tyler's average by t.

Then .94 + .78 + .83 + t

-------------------------- = 83.75%

Multiplying both sides by 4, we get 2.55 + t = 3.35

so that t = 3.35 - 2.55 = 0.80

Tyler got 80%.

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