Question

The average amount of monet spent per day by students in Mrs .Ross'a class for lunch is $2 .In this class,90% of students spend less than what amount per day?

Answer 1

I feel like there is not enough information given, if you said that it follows the normal model and gave me an n I could work the math out.

Answer 2

let a =amount spent by 90% and b = amount spent by 10%
so 0.9a +0.1b =2. and so a is maximized when b =0 so a<,=2/.9=2.22.
not sure if this is correct but it's worth a try. is this right?