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 14 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 30 + 2 x 32 + 3 x 36
= 30 + 64 + 108
= 202
(b)
Number of children in families that have at least two children who have moved out
=
14 x (64 + 108)
=
14 x 172
= 43
Number of children left
= 202 - 43
= 159
Answer(s): (a) 202; (b) 159