a test contains 10 true false questions are correct answer is awarded 2 Marks and a wrong Answer is awarded -1 and a question not answered is awarded 0 a student attempt 7 questions and get 8 marks how many questions did the students answer correctly
Answers
Answered by
18
Answer:
5
Step-by-step explanation:
Let correct attempts be x and incorrect attempts be y
Total attempts = x+y = 7 ...(1)
Total marks = 2x-y = 8 ...(2)
adding (1) and (2)
3x +y-y = 7+8
3x = 15
x = 5 and y = 2
So 5 correctly attempted questions
sumeet1908:
it's fine
Answered by
5
Hope it helps you !....................
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