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 710 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 42 + 2 x 17 + 3 x 52
= 42 + 34 + 156
= 232
(b)
Number of children in families that have at least two children who have moved out
=
710 x (34 + 156)
=
710 x 190
= 133
Number of children left
= 232 - 133
= 99
Answer(s): (a) 232; (b) 99