Please help to solve a problem. If it is possible, in detail paint. Ocheen it is urgently necessary It is known that 3/5 classes went to cinema, and 2/3 to an exhibition. How many pupils in a class, if their more than 25 but less than 35?

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If the Denominator 3rd 5 that can be or 5 or 0 at the end, it turns out that 25 is not divided into 3 and 30 is divided into both numbers, and 35 is not divided into 3 so only 30 pupils
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