3 years ago

There are 9 students in a class. The teacher chooses 2 students to go to the

Mathematics

1 answer:

Ahat [919]3 years ago

8 0

Answer: 72

Step-by-step explanation:

There are 9 students to choose from to go the library. After that person is chosen there are 8 students remaining.

First student and Second student

9 x 8 = 72

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Given that original lenght of the board before cut $= \frac{7}{10}$ meter

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Now we have to find the lenght of the piece which is cut.

To find that we just need to subtract smaller piece from larger piece

Required Length $= \frac{7}{10}-\frac{3}{10}$ meter

Required Length $= \frac{7-3}{10}$ meter

Required Length $= \frac{4}{10}$ meter

reduce the fraction

Required Length $= \frac{2}{5}$ meter

Hence final answer is $\frac{2}{5}$ meter.

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