Question

Blaize has to take four tests in his physics class. He did not prepare for the first test and scored a 65. The average of the four tests must be a 80 or more in order for him to pass his class. What is the lowest possible average Blaize could earn on the next three tests to receive an 80 the class. Select one:

A. 77
B. 82
C. 83
D. 85

Answer 1

85 because 85+85+85+65=320/4=80

Answer 2

Blaize has to score at least 85 in rest three tests to pass his class.

Explanation:

Blaize scored in the first test of Physics = 65

Average of Four tests must be 80 or more to pass the class.

Let he scores x in rest three tests to pass the class.

Average of four tests =
`(x+x+x+65)/(4)`

80 =
`(3x+65)/(4)`

3x + 65 = 80×4

3x + 65 = 320

3x = 320 - 65

3x = 255

x =
`(255)/(3)`

x = 85

Therefore, Blaize has to score at least 85 in rest three tests to pass his class.