alfbeezzz
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36 students each went to one revision class.
1/6 of the students went to the physics revision class.
2/9 of the students went to the biology revision class.
All of the other students went to the chemistry revision class.
How many students went to the chemistry revision class?

Answer :

alexaq
(Sorry, I'm not really sure about this problem. But If I were you I would probably add 1/6 + 2/9 to see how many student in total did not go to the chemistry revision class. I'm terrible at math, sorry I couldn't help that much.)

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