Question

Sam scored 59, 64, and 68 on three test. How many points should he get on the fourth test to get an average score of 70?

A. 63.67 points
B. 65.25 points
C. 75 points
D. 89 points

Answer 1

To find this out the easy way, add up all the numbers and an answer, then divide by 4.

59 + 64 + 68 + 63.67 = 254.67

254.67/4 = 63.66

A is not correct.

59 + 64 + 68 + 65.25 = 256.25

256.25/4 = 69.25

B is not quite correct.

59 + 64 + 68 + 75 = 266.

266/4 = 66.5

C is not correct.

59 + 64 + 68 + 89 = 280

280/4 = 70.

D.) is the correct answer.

I hope this helps!

Answer 2

The correct answer would be (D - 89 points)
59+64+68
=191 + 89
=280/4
=70(%)