Question

Julie can't remember what she made on one
of her tests in math. She knows that she
made a 100, 95, and an 80. She also knows
that the mean for the 4 tests is a 92. What
was her grade on the other test?

Answer 1

Answer: 93

Explanation:

Firstly, we need to know the rural.scire for the 4 tests. Since the mean for the 4 tests is a 92, the total score will be:

= 4 × 92

= 368

Since we want to know the score for he 4th test, we add the score for the 3 tests that she remembers and subtract from 368. This will be:

= 368 - (100 + 95 + 80)

= 368 - 275

= 93

She had 93 in her last test.