The following table gives the distribution of the lifetime of neon lamps.
Lifetime(in hours)
More than or equal to 1500
More than or equal to 2000
More than or equal to 2500
More than or equal to 3000
More than or equal to 3500
More than or equal to 4000
More than or equal to 4500
More than or equal to 5000
No: of lamps
400
386
330
270
184
110
48
0
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