Question

A factory packs water in half liter, one liter, two liter and five bottles. On a certain day, the factory packed 20 840 bottles and of water .out of these, 8120 were half liter bottles and 3960 were two liters bottles. One liter bottles were 2000 more than the two liter bottles. The rest were five liter bottles. How many five liter bottles were there?

Answer 1

If the bottles numbered w,x,y,z respectively, then we have

w+x+y+z = 20840
w = 8120
y = 3960
x = y+2000

Now you can solve to find z.