Question

1. Is picnic is beginning planned in a school for class 8th girls are
30% of the total number of students and are 18 in number​

Answer 1

Answer :-

There are total 60 students in class and 42 boys in number if you talk of in percent there are total 70%.

Step - by - step - explanation :-

Given :- There are 18 or 30% girls in a classroom.

To find :- Number of boys and Total Number of students in classroom. (In number and in percentage).

Solution :- In a classroom there are 100% students. Out of which 30% are girls.

Then, 100% - 30% = 70%

Let the number of boys students in classroom be x.

•°• 18 —— 30 ...(First no. then %)

x —— 70

•°• By cross - multiplication and division,

x = 18 × 70

30

x = 42.

Total number of students in classroom

= No. of boys + No. of girls

= 42 + 18

= 60.

•°• Total number of boys in classroom is 42 and total percent is 70%. Total number of students in classroom is 60.