Question
The table shows the number of families living in different types of HDB flats in a new town last year. This year, 11 families from the 2-room flat and 19 families from 3-room flat moved to 5-room flat. At the same time, 10 families from 4-room flat moved to 3-room flat. How many families live in a HDB flat with less than 4 rooms this year?
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The table shows the number of families living in different types of HDB flats in a new town last year. This year, 11 families from the 2-room flat and 19 families from 3-room flat moved to 5-room flat. At the same time, 10 families from 4-room flat moved to 3-room flat. How many families live in a HDB flat with less than 4 rooms this year?