Question

A question paper has a 20 questions answer to each of the which the other true or false a student scored 3 marks for every correct answer and the loose 2 marks for every incorrect answer if the student scored 25 marks find the number of questions and answer correctly and the questions answer correctly.​

Answer 1

Answer:

let the no. of correct ans=x

incorrect ans=y

according to question,

x + y= 20

3x-2y=25

use elimination method

3(x+y=20) =3x+3y=60

3x-2y=25

subtract these equations

we get, 5y=35

y=35/5 =7

now, x+y=20

x+7=20

x=20-7 = 13

no. of correct ans=7 and incorrect ans=13

plzz mark me brainliest

Answer 2

Answer:

Step-by-step explanation:

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