Question
Mathematics Question on Graphical Representation of Data
| The following table gives the lifetimes of 400 neon lamps: Length (in hours) | Number of lamps |
|---|---|
| 300 − 400 | 14 |
| 400 − 500 | 56 |
| 500 − 600 | 60 |
| 600 − 700 | 86 |
| 700 − 800 | 74 |
| 800 − 900 | 62 |
| 900 − 1000 | 48 |
(i) Represent the given information with the help of a histogram.
(ii) How many lamps have a lifetime of more than 700 hours?
Answer
(i) Representation of the given in the form of histogram is as follows:
(ii) Number of lamps having lifetime of more than 700 hours = 74 + 62 +48 = 184