Lois wants to send a box of oranges to a friend by mail. the box of oranges cannot exceed a mass of 10 kg. if each orange has a mass of 200g, what is the maximum number she can send?

No. of Oranges = Total Mass/Mass of one orange
IF only the mass of oranges is considered(not the box)

So, No. of oranges = 10*1000g/200g
                                  =  50
So answer is 50 oranges.