Question

out of 200 students 80 are girls. find the percentage of boys.​

Answer 1

Step-by-step explanation:

Total students = 200

No. of boys = 80

No. of girls = 200 - 80

Therefore no. of girls in class = 120

Probability of having boys in class = 80/200

= 0.67

Probability of having girls in class = 120/200

= 0.6

Answer 2

The percentage of boys = 60%

Given :

Out of 200 students 80 are girls

To find :

The percentage of boys

Concept :

Percentage

In study mathematics the term percentage is used. It is denoted by the symbol %

The percentage is a number or ratio which is expressed as a fraction of 100.

PROCESS

In order to calculate percentage we divide the number by whole and multiply by 100

Solution :

Step 1 of 2 :

Calculate number of boys

Total number of students = 200

Number of girls = 80

∴ Number of boys = 200 - 80 = 120

Step 2 of 2 :

Calculate percentage of boys

The percentage of boys

$\displaystyle \sf = \frac{120}{200} \times 100\%$

$\displaystyle \sf = \frac{120}{2} \%$

$\displaystyle \sf = 60\%$

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