Question

Out of 100 students of a class, 30% like to watch T.V. How many students like to watch T.V. ?

70

50

60

30
​

Answer 1

The number of students that like to watch T.V. is 30

Step-by-step explanation:

Given: 30% of students like to watch T.V., and the total number of students is 100

To be found: The number of students that like to watch T.V.

Solution:

Let the number of students to be found be 'a'

Then, we can write

$30\% \times 100 = a$

$\frac{30}{100} \times 100 = a$

$30 = a$

Thus, the number of students that like to watch T.V. is 30.

Answer 2

Given:

In a class of 100 students, 30% of the students like to watch T.V.

To Find:

The total number of students who like to watch TV.

Solution:

The given problem can be solved using the concept of percentages.

1. The total number of students in the class is 100. A total of 30% of the students like to watch T.V

2. The percentage is defined as the part occupied when a certain quantity is divided into 100 parts.

=> For example: 5% of 100 is 5. ( 5 out of 100 parts ).

3. The total number of students who like to watch T.V is;

=> 30% of 100,

=> a % of b = (a x 100)/b,

=> 30% of 100 = (30x100)/100 = 30.

=> Total number of students who watch T.V = 30.

Therefore, option D is the correct answer. 30 students like to watch T.V