Christine took 3 tests and had an average of 76. She has one more test to take and she wants an average of 80. What is the lowest score she can get on the last test? 10pts

Question

Mathematics

Bradley Larsen

23 May, 18:19

Christine took 3 tests and had an average of 76. She has one more test to take and she wants an average of 80. What is the lowest score she can get on the last test? 10pts

+3

Answers (1)

Know the Answer?

Jerimiah Frazier · Answer 1

Answer: She has to score a minimum of 92 marks to take her average to 80

Step-by-step explanation:

Let the equation be

Three months total = 76 x 3 = 228

(x + 228) / 4 = 80

x + 228 = 80 x 4

x = 320 - 228

x = 92