The graph shows the number of families and the number of children in each family in a block of flats.
- How many children are there in the whole block of flats?
- If 16 of the families who have at least two children move out of the block of flats, how many children are there left in the block of flats?
(a)
Number of children
= 1 x 50 + 2 x 48 + 3 x 22
= 50 + 96 + 66
= 212
(b)
Number of children in families that have at least two children who have moved out
=
16 x (96 + 66)
=
16 x 162
= 27
Number of children left
= 212 - 27
= 185
Answer(s): (a) 212; (b) 185