Question

72percrnt of 25 students are good in mathematics. How many students are not good in it ?
Basket contains 350 eggs. If 12% of the eggs are rotten, find the number of eggs good en
sold.​

Answer 1

$\red{Question:-}$

72% of 25 students are good in mathematics. How many students are not good at it?

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Total number of students = 25

It is given that 72% are good in mathematics. So:-

${\implies}72\% \: of \: 25 \\ {\implies} \frac{72}{100} \times 25 \\ {\implies}\frac{72}{4} \\ {\implies}18$

Therefore, 18 students are good at mathematics.

The number of students which are not good at mathematics = Total number of students - Number of students which are good at mathematics.

The number of students which are not good at mathematics =25 - 18 = 7 students

Your answer = 7 students

$\red{Question:-}$

Basket contains 350 eggs. If 12% of eggs are rotten, find the number of eggs which were good and sold.

$\green{Answer:-}$

Total number of eggs=350

It is given that 12% of eggs are rotten.So:-

${\implies}12\% \: of \: 350 \\{\implies} \frac{12}{100} \times 350 \\{\implies} 6 \times 7 \\ {\implies}42$

Therefore, 42 eggs were rotten.

The number of eggs which were good and sold = Total number of eggs - Rotten eggs

The number of eggs which were good and sold = 350 - 42 = 308 eggs

Your answer = 308 eggs

Answer 2

Answer:

$Number\: of\: students\: good \:in\\ mathematics = 72\% \:of \:25$

$i)Number\: of\: students\: not \:good \:in\\ mathematics = (100-72)\% \:of \:25\\= 28\% \:of \:25\\=\frac{28}{100}\times 25\\= 7$

$ii) Total \:eggs \: in \:the \: Basket = 350$

$Number \:of \: rotten \:eggs = 12\%\: of \:350$

$Number \: of \: good \: eggs = (100-12)\% \:of \:350 \\= 88\% \:of \:350\\= 88\% \times 350\\= \frac{88}{100} \times 350\\= 44\times 7 \\= 308$

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