Delete please . . . .

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- March 5th 2010, 10:20 AMAladdinNumber of students in Class
Delete please . . . .

- March 5th 2010, 10:34 AMArchie Meade
hi Aladdin,

if we can assume that the students who "look like' they are listening are in fact

not listening and those who are talking are also not listening and do not look like they are listening (each group is seperate)

then, if x is the total number of students