A pupil’s marks were wrongly entered as 85 instead of 75. Due to that the average marks for the class got increased by one-third (1/3). The number of pupils in the class is
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3
Answer:
30
Step-by-step explanation:
Let there be x pupils in the class.
Total increase in marks = (x * 1/3) = x/3.
x/3 = (85 - 75)
=> x/3 = 10 =>
x = 10 * 3
x = 30
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