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Question:

The following table gives the life times of 400 neon lamps: (i) Represent the given information with the help of a histogram. (ii) How many lamps have a life time of more than 700 hours?

Solution:

(ii) Lifetime of more than 700 hours: 700–800, 800–900, 900–1000
Number of neon lamps = 74 + 62 + 48 = 184