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To check the quality of two brands of lightbulbs, their life in burning hours was estimated as under for 100 bulbs of each brand.
Life (in hrs)
No. of bulbs
Brand A
Brand B
0–50
15
2
50–100
20
8
100–150
18
60
150–200
25
200–250
22
5
100
(i) Which brand gives higher life?
