The average mark of a student in an examination hall was 68. If he had scored 18 marks in English and 4 marks in Mathematics paper, his average would have been 70. How many papers were there in the exam?
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hey there
Step-by-step explanation:
english..18 marks
maths..4 marks
average would be 70
means (18+4)÷x =70
x=35÷11= 3 avg
here x is the number of subject.
so the answer is there were 3 subjects
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