Question

please solve this all questions I make brainlist God promise

Answer 1

Hope u like my process
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14)

=> 40% of population are men

=> 35% are women

=> so rest will be children i.e. (100-40-35)

=25%

So let the total number of population be x
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By problem,
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$= > \frac{25}{100} x = 20000 \\ \\ = > x = \frac{20000}{25} \times 100 = \bf 80000$
So number of men =
$\frac{40}{100} \times 80000 \bf= 32000$
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15)

=> 30% of alloy is zinc

=> 45% of alloy is nickel

=> rest of alloy is copper = (100-45-30)

=25%

Total wight of alloy = 400 g

So,

Weight of copper = $\bf \frac{25}{100} \times 400 = \underline{100 \: \: g}$
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16)

Total number of students = 38

So number of students absent = 3

Rest of students = 38 - 3 = 35

20% of 35 students haven't done their work.

So 80% did it..

So number number of students who did their homework = $\frac{80}{100} \times 35 = \bf 28$
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17)

Let the total marks be x

If 49% of total marks is 294

Then,

$= > \frac{49}{100} x = 294 \\ \\ = > \bf \: x = \frac{294 \times 100}{49} = 600$

So,

Ranjan scores = 372

Thus his percentage = $\frac{372}{600} \times 100 = \bf \: \underline{62\%}$
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