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How do I solve a question saying, if the the ten worst students with an average...

How do I solve a question saying, if the the ten worst students with an average mark of 38% withdrew from a class of 80 students with a mean of 65% what would be the class average of the remaining 70 students?

Math   Statistics-And-Probability   
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Answer #1

Answer:

Explanation:

Let the average marks of the remaining 70 students is x%.

Now,

equating total marks of all students,

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