Question 14 Marks

The following table shows the marks of 180 students in Mathematics. Find the value of '$x$' and draw histogram.

Marks	No. of Students
0 - 10	25
10 - 20	$x$
20 - 30	30
30 - 40	$2x$
40 - 50	65

Find the value of ‘$x$’ and draw histogram.

Answer

Sum of students = $25 + x + 30 + 2x + 65 = 180$
$3x + 120 = 180 \implies 3x = 60 \implies x = 20$.
Frequencies: 25, 20, 30, 40, 65.

View full question & answer→