Question
There were 30 men, 17 women and 13 children onboard a bus. At the first bus-stop, 8 men, 4 women and 9 children alighted. At the same time, 30 children and 7 women boarded the bus. How many more adults than children were there in the bus after leaving the first bus-stop?
4 m

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There were 30 men, 17 women and 13 children onboard a bus. At the first bus-stop, 8 men, 4 women and 9 children alighted. At the same time, 30 children and 7 women boarded the bus. How many more adults than children were there in the bus after leaving the first bus-stop?