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 49 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 61 + 2 x 45 + 3 x 42
= 61 + 90 + 126
= 277
(b)
Number of children in families that have at least two children who have moved out
=
49 x (90 + 126)
=
49 x 216
= 96
Number of children left
= 277 - 96
= 181
Answer(s): (a) 277; (b) 181