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A group of students were asked some questions about how they travelled to school. 1/2 of them said they walked. 1/3 of them said they travelled by bus. In the group there were more than 20 students and less than 30.
a) How many students were there in the group

b) what fraction of students came by car? give answer in simplest form.

The answer will be an integer that is evenly divisible by both 2 and 3. There is only one such number between 19 and 29, inclusive. Try them all yourself to see which it is.

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