Study the given bar graph and answer the question below.

From the bar graph, the marks and number of students are:

125 → 1
130 → 3
135 → 2
140 → 8
145 → 5
150 → 4
160 → 1

Total students = 1+3+2+8+5+4+1 = 24

Now find average marks:

Total marks
= 125(1) + 130(3) + 135(2) + 140(8) + 145(5) + 150(4) + 160(1)
= 125 + 390 + 270 + 1120 + 725 + 600 + 160 = 3390

Average $= \frac{3390}{24} = 141.25$

Students scoring less than 141.25 are those with marks: 125, 130, 135, 140

Number of such students
= 1 + 3 + 2 + 8 = 14

Answer: 14 students