The following table gives the life times of 400 neon lamps: | Life time (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 life time of more than 700 hours?
Is it correct to say that in a histogram, the area of each rectangle is proportional to the class size of the corresponding class interval? If not, correct the statement.
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