Question

please give step by step explanation​

Answer 1

Step-by-step explanation:

(i) In a class test,

marks given for every correct answer = 3

marks given for 12 correct answer = 12×3= 36

radhika obtained 20 marks in the class testt

therefore, marks obtained for incorrect answer = 20 -36

= -16

therefore, marks given for one incorrect answer = -2

so, no of incorrect answer = -16× (-1/2)

=8

Thus, radhika has attempted = 8 incorrect questions

(ii) Marks given for seven correct answer = 3×7=21

Mohini scores = -5

Marks obtained for incorrrect answer = -5-21 = -26

now, marks given for one incorrect answer = -2

therefore, no of incorrect answer Mohini has attempted = -26×(-1/2)=13

13 incorrect question

Answer 2

Answer:

i) 8 questions were incorrect

ii) 13 questions were incorrect

Step-by-step explanation:

i) no of questions she attempt correctly = 12

no of marks she would get = 12×3 = 36

marks she got = 20

36 + x = 20

x = 20 - 36

x = -16

-16/-2

8 questions

ii) no of questions she attempt correctly = 7

no of marks she would get = 7×3 = 21

marks she got = -5

21 + x = -5

x = -5 - 21

x = -26

-26/-2

13 questions

marks she got = -5

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