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 45 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 51 + 2 x 16 + 3 x 31
= 51 + 32 + 93
= 176
(b)
Number of children in families that have at least two children who have moved out
=
45 x (32 + 93)
=
45 x 125
= 100
Number of children left
= 176 - 100
= 76
Answer(s): (a) 176; (b) 76