Question

2 of students in a class are girl.
3 If there are 17 boys.Find the number of the girls​

Answer 1

Answer:

20

Step-by-step explanation:

is it correct or false

Answer 2

Correct Question:

2/3rd of students in a class are girls. If there are 17 boys. Find the number of the girls.

Given:

✰ 2/3rd of students in a class are girls.

✰ Number of boys in a class = 17

To find:

✠ The number of the girls in a class.

Solution:

Let's understand the concept first!

• First we will assume the total number of students in a class as x, then we know that 2/3rd of students in a class are girls, which means 2/3rd of x in a class are girls ( where "of" represents that 2/3rd will be multiplied by x ).
• We already know that the total number of boys in the class are 17.
• When we add both the number of boys and the number of girls in the class, we get the total number of students which are x.
• Thus, forming an adequate equation and doing the required calculations, we will find out the value of x.
• After that we will substitute the value of x in the number of girls to find the total number of girls in a class.

Let's find out...✧

Let the total number of students in a class be x.

Then,

⟹ Number of girls in a class = 2/3rd of total students

⟹ Number of girls in a class = 2/3rd of x

⟹ Number of girls in a class = 2/3 × x

⟹ Number of girls in a class = 2x/3

⟹ Number of boys in a class = 17

Now,

➤ Number of boys + Number of girls = Total number of students

➤ 2x/3 + 17 = x

➤ (2x + 51)/3 = x

➤ 2x + 51 = x × 3

➤ 2x + 51 = 3x

➤ 51 = 3x - 2x

➤ x = 51

∴ The total number of students in a class = 51

➛ Number of girls in a class = 2/3 × x

➛ Number of girls in a class = 2/3 × 51

➛ Number of girls in a class = 2 × 17

➛ Number of girls in a class = 34

∴ The number of girls in a class = 34

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