Question

a test paper has 20 multiple choice question each correct answer is awarded 3 marks but -2 marks are given for every wrong answer no marks are awarded or detected for question that are not attempted . Rajshree scores 5 marks in a test if she answers 7 question correctly find the number of questions she did not answer correctly and also the number of questions she did not attempt​

Answer 1

Answer:

no. of questions attempted=15

correct=7

wrong=8

unattempted =20-15=5

Step-by-step explanation:

let number of questions attempted wrongly be "x"

then

no. of question attempted correctly is 7

total marks for correct answers is. 7×3=21

total marks deducted is

-2× x=-2x

given

21-2x=5

16=2x

x=8

no. of questions attempted

wrongly is 8

hope the answer is helpful.