Question

in a college, 63% of students are less than 20 years of age. The number of students
more than 20 years of age is
42. What is the total number of students in the college?
​

Answer 1

Answer:

let the total number of students be x.

Given that 20% of students are below 8 years of age.

Then the number of students above or equal the 8 years of age =80% of x⟶(1)

Given that number of students of 8 years of age =48⟶(2)

Given that number of students above 8 years of age =

3

2

of number of students of 8 years of age.

⟹ NUmber of students above of age 8=

3

2

×48=32⟶(3)

From equation (1), equation (2) and equation (3)

80% of x =48+32=80

⟹

100

80x

=80

x=100

Step-by-step explanation:

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