How do you tell side-side-side, side-angle-side, angle-angle-side apart?

Ananya's total score was 50 marks.

Step-by-step explanation:

Given that in an examination a candidate scored 5 marks for a correct answer, -2 for an incorrect answer and 0 marks for a question that has not been attempted, and the examination comprises 20 questions, and Ananya has answered 12 correct answer and 5 incorrect answers, to find her total score the following calculation must be performed:

(12 x 5) + ((20 -12 - 5) x 0) + (5 x -2) = X

60 + (3 x 0) + (-10) = X

60 + 0 - 10 = X

50 = X

Therefore, Ananya's total score was 50 marks.