Question

In an examination consisting of 150 questions, one mark is given for every correct answer and

one-fourth marks is deducted for every wrong answer. A student attempts all the 150 questions

and scores a total of 100 marks. Find the number of questions he marked wrong.​

Answer 1

Answer:

40 questions.

Step-by-step explanation:

let the correct answers be x.

then,he attempt 150 questions

therefore the incorrect answers will be (150-x).

Now,

1×x + (150-x)×(-1/4)= 100

4x - 150+x=400

5x-150=400

x-150=80

x=40

HOPE IT HELPS...

Answer 2

Answer: let no. of correct answers be x

if he attempted 150 questions

therefore incorrect answers will be 150 - x

1x + (150-x)-1/4 = 100

4x - 150 +x = 100*4

5x - 150 = 400

5x - 150 = 400

x - 150 = 400/5

x - 150 = 80

x = 80 + 150

x = 40

Step-by-step explanation: PLS MARK ME BRAINLIEST