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Answer :
(a) Number of bulbs sold on Friday are 14 bulbs.
(b) The maximum number of bulbs were sold on Sunday.
Which is 18 bulb
(c) equal number of bulbs were sold on Wednesday and Saturday.
(d) Minimum number of bulbs were sold on Wednesday and Saturday i.e 8 bulbs.
(e) Total number of bulbs sold in a week = 12 + 16 + 8 + 10 + 14 + 8 + 18 = 86