It is known that 3/4 (it is fraction) a class went to cinema, 2/9 - to an exhibition. How many pupils in a class, if their less than 40? Please, help, I give 30 points

Since. The class can be divided into nine and four parts, the number of pupils means has to be multiple at the same time to both four, and nine. The first possible option is 4*9=36. It also approaches under a condition 36lt; 40. Means, the answer: Pupils in class 36
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