Study the bar graph and answer the question.

The number of neon lamps having life of 600 hours or more but less than 800 hours is what percentage of the total number of neon lamps having a life of 800 hours or more?

68.75

Number of lamps with life 600 hours or more but less than 800 hours

= 75 + 90

= 165

Number of lamps having life 800 hours or more = 80 + 70 + 55 + 35

= 240

Required percentage = \(\frac{165}{240}\) × 100

= 68.75%