In an examination average of 50 students is 38.if average of all passed students is40.and that ofor fail studentso is 30.then find total number of passed students .
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Total students 50
Let passed X
Failed 50-X
X*40+(50-X)*30=50*38
1900=40X+1500-30X
400=10x
X=40
PASSED =40
FAILED =10
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