1.

Life of bulbs produced by two factories A and B are given below: Length of life (in hours): 550–650 650–750 750–850 850–950 950–1050 Factory A: (Number of bulbs) 10 22 52 20 16 Factory B: (Number of bulbs) 8 60 24 16 12 The bulbs of which factory are more consistent from the point of view of length of life? [NCERT EXEMPLAR]

Answer» Life of bulbs produced by two factories A and B are given below:





























Length of life

(in hours):
550–650 650–750 750–850 850–950 950–1050


Factory A:

(Number of bulbs)

10 22 52 20 16


Factory B:

(Number of bulbs)

8 60 24 16 12



The bulbs of which factory are more consistent from the point of view of length of life? [NCERT EXEMPLAR]


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