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?

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​​

Answer 1

Answer:

REF.Image

Numbers of neon lamps having their life time more than 700

= No. of neon lamps having their life time as 700-1000

= No. of neon lamps having their life time (700-800) + = No. of neon lamps having their life time 800-900+ = No. of neon lamps having their life time 900-1000 hours

=74+62+48=184.

Step-by-step explanation:

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