Question

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 .

Answer 1

Answer:

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