Study the given bar graph which shows the life time (in hours) of neon lamps and the number of neon lamps and answer the question that follows.
The number of neon lamps having life 800 hours or more but less than 1000 hours is what percent(correct to nearest integer) of the total number of neon lamps having life 700 hours or less?
Answer & explanation
Correct answer: option 3
Number of neon lamps having life 800 hours or more but less than 1000 hours
= 800 + 700
= 150
Total number of neon lamps having life 700 hours or less = 45 + 60 + 75 = 180
Required percentage = \(\frac{150 }{180}\) × 100
= 83.33%
= 83% ( nearest integer )