Study the given histogram and answer the question that follows.
The total number of neon lamps lifetime of 800 or more hours is approximately what percentage more than the total number of neon lamps having a lifetime of 400 or more hours but less than 800 hours?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 12.5%
The total number of neon lamps lifetime of 800 or more hours = 1350
The total number of neon lamps having a lifetime of 400 or more hours but less than 800 hours = 225 + 260 + 340 + 375 = 1200
Required % = (1350 - 1200)/1200 × 100 = 12.5%