Register
Chris has scored 78, 61, and 91 on his previous three tests. What score does he need on his next test so that his average (mean) is 78?
3.1k views
4 votes
Chris has scored 78, 61, and 91 on his previous three tests. What score does he need on his next test so that his average (mean) is 78?

User Georgy Grigoryev
by
4.9k points

1 Answer

6 votes
(78+61+91+x)/4=78
Rearrange So
(230+x)= 78 x 4
230 + x = 312
x = 312-230
X= 82
Chris need to score 82
User Nijeesh Joshy
by
5.7k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

5.6m questions

7.3m answers

Other Questions

What is the value of x? (-4) - x = 5
1/7 + 3/14 equivalent fractions
185g in the ratio 2:3
(3x1,000,000)+(3x100,000)+(2x100) what is this number written in standard form?
The function h = -t2 + 95 models the path of a ball thrown by a boy where h represents height, in feet, and t represents the time, in seconds, that the ball is in the air. Assuming the boy lives at sea
Link Copied!