Question

Evelyn is taking a multiple choice test with a total of 20 points available. Each

question is worth exactly 1 point. What would be Evelyn's test score (out of 20) if she
got 3 questions wrong? What would be her score if she got x questions wrong?

Answer 1

`Points = 17\ Points`

`Points = (20 - x)\ points`

Explanation:

Given

`Questions = 20`

`Points = 1`

Solving (a): 3 questions wrong

First, we need to determine the total possible points

`Total = Questions * Points`

`Total = 20 * 1\ point`

`Total = 20\ points` --- (1)

Next, is to determine the points of 3 questions

`3\ Questions = 3 * 1\ Point`

`3\ Questions = 3\ Points` --- (2)

Subtract (2) from (1)

`Points = 20 - 3`

`Points = 17\ Points`

Her test score is 17 points

Solving (b): x questions wrong

`x\ questions = x * 1\ point`

`x\ questions = x\ points` --- (3)

Subtract (3) from (1)

`Points = (20 - x)\ points`

Her points would be 20 - x points