Rational Numbers | Rational Numbers - Exercise

Question

$\frac{1}{6}$ of the class students are above average, $\frac{1}{4}$ are average and the rest are below average. If there are 48 students in all, how many students are below average in the class?

Accepted Answer

From the question it is given that,

Number of students in the class who are above average = $\frac{1}{6}$

Number of students in the class who are average = $\frac{1}{4}$

Number of students in the class who are below average = 1 – ( $\frac{1}{6}$ + $\frac{1}{4}$ )

= 1 –. $\frac{(2+3)}{12}$

$=1-\frac{5}{12}=\frac{(12-5)}{12}=\frac{7}{12}$ students

So, the number of students in the class = 48

Then,

Number of students below average = $\frac{7}{12}$ × 48

= 7 × 4

= 28 students

∴The number of students in the class who are below average is 28.

Rational Numbers | Rational Numbers - Exercise

Chapters in Mathematics Exemplar Problems - class 8

Exercises in Rational Numbers

Question 103