Answer:
Riya's total score is 65/100
Explanation:
You can calculate the total score for a class test by using the following formula:
(Let t = total score)
- t = (number of correct answers × marks per correct answer) - (number of wrong answers × marks per wrong answer)
In our case, if Riya got 15 correct answers out of 20 questions, then she got 5 wrong answers (20 - 15 = 5).
If each question is worth 5 marks for a correct answer and 2 marks for a wrong answer, we can plug in the numbers into the formula:
- t = (15 x 5) - (5 x 2) =?
Solving what is inside of the parenthesis gives us:
Therefore, Riya’s total score is 65 out of a possible 100.