Study the following histogram and answer the question :

(Note: The number of lamps is a multiple of 5)
The difference between the total number of neon lamps whose life time is 400 hours or more but less than 700 hours and the total number of neon lamps whose life time is 900 hours or more is t. The value of t lies between :

Correct option is B

​$$\textbf{Given :} \\\ \, \\400\text{–}500 = 40,\ 500\text{–}600 = 45,\ 600\text{–}700 = 60 \\\ \, \\900\text{–}1000 = 55,\ 1000\text{–}1100 = 35,\ 1100\text{–}1200 = 20 \\\ \, \\\textbf{Formula Used :} \\\ \, \\\text{Difference} = \left|\text{Total}_1 - \text{Total}_2\right| \\\ \, \\\textbf{Solution :} \\\ \, \\\text{Total (400 to 700)} = 40 + 45 + 60 = 145 \\\ \, \\\text{Total (900 or more)} = 55 + 35 + 20 = 110 \\\ \, \\t = 145 - 110 = 35 \\\ \, \\\textbf{Final Answer :} \\\ \, \\30 \text{ and } 40$$​​