Question

На виставку відібрали 80 найкращих зошитів. П"ята частина цих зошитів була з початкових класів, а решта - зі старших. Скільки зошитів школярів старших класів узяли на виставку?

Answer 1

Calculation of the Number of Notebooks from Senior Classes at the Exhibition

To determine the number of notebooks from senior classes that were selected for the exhibition, we need to use the information provided.

According to the given information, 80 notebooks were selected for the exhibition. The fifth part of these notebooks came from the primary classes, while the rest came from the senior classes.

Let's calculate the number of notebooks from senior classes:

1. Calculate the number of notebooks from primary classes: - The fifth part of the total notebooks is 1/5. - Therefore, the number of notebooks from primary classes is 80 * (1/5) = 16.

2. Calculate the number of notebooks from senior classes: - Subtract the number of notebooks from primary classes from the total number of notebooks: 80 - 16 = 64.

Therefore, 64 notebooks from senior classes were taken to the exhibition.

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