Thread: Ypip 7th batch
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Old Sunday, December 03, 2017
Cleopatra Cleopatra is offline
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Quote:
Originally Posted by Rehanbabar View Post
63-36=27

Let A be the average of the class and x be the no. of students.
A= 0.5A+27/x (due to those 27 marks the average was dropped to half)
0.5A=27/x
x=54
How has this expression "A= 0.5A+27/x" being formed? Where did the A go?
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