No. of days123456No. of students202x6040x50 No. of days 1 2 3 4 5 6 No. of students 20 2 x 60 40 x 50 The distribution above shows the number of days a grou...

$\begin{array}{ccccccc}\text{No. of days}& 1& 2& 3& 4& 5& 6\\ \text{No. of students}& 20& 2x& 60& 40& x& 50\end{array}$

The distribution above shows the number of days a group of 260 students were absent from school in a particular term. How many students were absent for at least four days in the term

Answer Details

3x + 170 = 260
3x = 260 - 170
3x = 90 $\to$ x = 30
therefore, 20 + 2x + 60 + 40
= 180