Math, asked by ayush8290, 11 months ago

In a class test (+ 3) marks are given for every correct answer and (–2) marks are

given for every incorrect answer and no marks for not attempting any question.

(i) Radhika scored 20 marks. If she has got 12 correct answers, how many questions

has she attempted incorrectly? (ii) Mohini scores –5 marks in this test, though she has

got 7 correct answers. How many questions has she attempted incorrectly?

(iii) Rakesh scores 18 marks by attempting 16 questions. How many questions has

he attempted correctly and how many has he attempted incorrectly?​

Answers

Answered by eshwar10thpro
4

Answer:

12*3=36

36-20=16

16/2=8

Radhika answered 8questions wrong

7*3=21

-5-21=-26

26/2=13

Mohini answered 13 questions wrong

x+y=16

3x-2y=18

3x-2y=18

2x+2y=32(Simultaneous equations)

5x=50

x=10

on putting the value of x in eq 1

10+y=16

y=6

Rakesh answered 10questions correctly and 6 questions wrongly

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