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.....
Answers
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
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