In a frequency table, the number of students scoring $40$, $50$, $60$, $70$, $80$ marks are $3, 5, 8, 4, 2$…
In a frequency table, the number of students scoring $40$, $50$, $60$, $70$, $80$ marks are $3, 5, 8, 4, 2$ respectively. How many students scored less than $60$ marks?
$5$
$8$
$13$
$16$
Solution
Students scoring less than $60$ are those scoring $40$ and $50$, i.e. $3+5 = 8$.