Question

In a class 30% of the students are high achievers 40% of the students are average achievers and the 15 students are low achievers how many total students are in the class​

Answer 1

Total number of students in the class =50

Step-by-step explanation:

Given:-

In a class 30% of the students are high achievers 40% of the students are average achievers and the 15 students are low achievers .

To find:-

How many total students are in the class?

Solution:-

Total number of students in the class be X

Number of students are high achievers=30% of the students

=>30X/100

=>3X/10

Number of students are average achievers =40% of the students

=>40X/100

=>2X/5

Number of students are low achievers=15

Total students =Number of students are high achievers+Number of students are average achievers+Number of students are low achievers

=>X=(3X/10)+(2X/5)+15

LCM of 5 and 10 =10

=>X=(3X+4X+150)/10

=>X=(7X+150)/10

=>10X=7X+150

=>10X-7X=150

=>3X=150

=>X=150/3

therefore,X=50

Answer:-

Total number of students in the class =50

Check:-

Toatal number of students=50

Number of students are high achievers=40%of 50

=>(40×50)/100

=>4×5

=20

Number of students are average achievers=30% of 50

=>(30×50)/100

=>3×5

=15

Remaining students=50-(20+15)

=>50-35

=>15

Number of students are Low achievers=15

Verified the given relations.

Answer 2

Step-by-step explanation:

50 students are there in class

You got ur answer