Please give the correct answer... by full step by step explanation ....
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Please give the correct answer... by full step by step explanation ....
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Answer:
incorrect answer is 4
Step-by-step explanation:
first multiply 20×4= 80
next, 80-64= 16
16 is the correct answers and 4 are incorrect answer
Answer:
correct answer = 4 marks
incorrect answer = -1 marks
rahul attempted all the questions
scored = 64 marks
20 correct answer
I) let the incorrect answers he gave be x
then
20 × 4 + x(-1) = 64
80 - x = 64
x = 80 - 64
x = 16
incorrect answers he gave is 16 questions
ii) total questions = correct answer + incorrect answers
total = 16 + 20
= 36
total 36 questions