Question

in a class test (+ 3) marks are given for every correct answer and (-2) marks are every
for every in correct answer and no marks for not attempting any question () Radhika
scored 20 marks If she got 12 correct answer How many questions she attempted in
correctly in) Mohini scores (-5) mariesthought she has got 7 correct answers How many
questions she attempted in correctly​

Answer 1

Answer:

(i) 8

(ii)13

Step-by-step explanation:

(i) correct answers=12

incorrect answers=??

points=20

According to question, 12(3)+x(-2)=20

36-2x=20

-2x=20-36

-2x=16

x=-16/-2

x=8

Radhika had 8 incorrect answers.

(ii)Correct answer=7

Incorrect answer=??

total marks=-5

According to question, 7(3)+y(-2)=-5

21-2y=-5

-2y=-5-21

y=-26/-2

y=13

Mohini attempted 13 questions incorrectly.