How many school teachers does J represent?
The following table gives the life times of neon lamps:
Length (in hours)
Number of lamps
300 − 400
400 − 500
500 − 600
600 − 700
700 − 800
800 − 900
900 − 1000
14
56
60
86
74
62
48
(i) Represent the given information with the help of a histogram.
(ii) How many lamps have a lifetime of more than 700 hours?