Question

13.There are 40 students in a class. 2/5 of the total number of students are girls. The number of boys in the class are​

Answer 1

Answer:

The number of boys in the class are 24 .

Step-by-step explanation:

Total no. of students = 40

No. of girls = 2/5 of the total no. of students

= 2/5 × 40

= 16

No. of boys = Total no. of students - No. of girls

= 40 - 16

= 24

Answer 2

Stated -

• Total numbers of students are 45 in class
• 2/5 of the students are girls

Asked -

• The total number of boys in class.

Explanation -

⠀In the question,we have been asked that if total number of students are 45 given that in which 2/5 are girls then what should be the total number of boys in class.If total numbers of girĺs are given in fraction. So, we will too find out it by taking fraction and after that we will find the given number to.

⠀Firstly, we will find the total numbers of boys in ratio.After that, we will multiply the given or total numbers of students with the given denominators.It means we will first find the total numbers of gírls.

Solution -

Total numbers of students = 45

Total numbers of girls = 2/5

$\dashrightarrow \sf{40\times\dfrac{2}{5}}$

$\dashrightarrow \sf{\dfrac{40\times 2}{5}}$

$\dashrightarrow\sf\dfrac{80}{5}$

$\dashrightarrow \underline{\boxed{\frak{\pink{16 \: \sf girls}}}}$

— Hence, the total number of gìrls are 16..

Now,

⠀As asked in the question, we have to find the numbers of boys now respèctively.. given, we have to find the answer in numbers as well as in fraction too. Let's find it!

Let the total numbers of boys let be x

➠ Total number of gírls + Total numbers of boys = Total number of students

➠ 16 + x = 40

➠ x = 40 - 16

➠ x = 24

— Hence, Total numbers of boys are 24 in class.

Since,

⠀We have got the total numbers of boys but now, we have to find the answer in fraction.

⠀As, In [2/5] 5 represents 40 students whereas 2 represent the total numbers of gírls so, we will divide the value to find it out..

$\twoheadrightarrow$ For gírls — 16/40 = 2/5

$\twoheadrightarrow$For boys — 24/40 = 3/5

Final Answer -

⠀⠀⠀➠ Therefore, total number of boys are 24 whereas the numbers of fraction is 3/5..

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