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
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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.
nargis78:
how u know no of questions are 15
7 are right &8 are wrong so 7+8 =15
as total marks are 5 as i solved before
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