Question

In a class test of 30 questions, 5 marks are given for every correct answer and (-2) marks are given for every incorrect answer. Rehana answers all questions but only 18 of her answers were correct. Find her total score. PLEASE GIVE BRIEF EXPLAINATION.....

Answer 1

Answer:

66

Step-by-step explanation:

the given questions = 30

the total marks = 30×5 = 150

rahana correct questions = 18

so than total marks = 18×5 = 90

rehana wrong questions = 12

so tjan total marks = 12×-2 = -24

by according to the sum

rehana total marks = 90+(-24)

=90-24

=66

Answer 2

total questions = 30

marks awarded for the correct answer = 5

marks awarded for the wrong answer = (-2)

number of answers Rehana got right = 18

number of answers Rehana got wrong = total questions - number of answers

                                                                    Rehana got right

                                                                 = 30 - 18 = 12

marks she got for right answers = 5 × 18 = 90

marks she got for wrong answers = 12 × (-2) = -24

total marks = (-24) + 90 = 66

her total score is 66