Study the given bar graph which shows the lifetime (in hours) of neon lamps and the number of neon lamps and answer the question that follows.
The number of neon lamps having a life of 800 hours or more but less than 1000 hours is what percent (correct to the nearest integer) of the total number of neon lamps having a life of 700 hours or less?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 83%
According to the question
The number of neon lamps having a life of 800 hours or more but less than 1000 hours
= 80 + 70 = 150
The total number of neon lamps having a life of 700 hours or less = 45 + 60 + 75 = 180
Now, the required % = (150/180) *100 = 500/6 = 83%