Answer:
In the given pictograph, 1 picture = 2 bulbs Now, number of bulbs sold on Monday = 6 pictures = 6 x 2 = 12 bulbs Number of bulbs sold on Tuesday = 8 x 2 = 16 bulbs Number of bulbs sold on Wednesday =4x2=8 bulbs Number of bulbs sold on Thursday = 5 x 2 = 10 bulbs Number of bulbs sold on Friday = 7 x 2 = 14 bulbs Number of bulbs sold on Saturday = 4 x 2 = 8 bulbs Number of bulbs sold on Sunday = 9 x 2 = 18 bulbs (a) Number of bulbs sold on Friday = 7 x 2 = 14 bulbs (b) Maximum number of bulbs were sold on Sunday i.e. 18 bulbs. (c) The same number of bulbs were sold on Wednesday and Saturday i.e. 8 bulbs. (d) The minimum number of bulbs were sold on Wednesday and Saturday i.e. 8 bulbs. (e) Total number of bulbs sold in a week \[=12+16+8+10+14+8+18=86\] Now, number of cartons which can hold 9 bulbs \[=\frac{1}{9}\] and number of carton which can hold 1 bulb. \[\therefore \] Number of cartons which can hold 86 bulbs \[=\frac{1\times 86}{9}\] \[=\frac{86}{9}=9\frac{5}{9}\approx 10\] Hence, 10 cartons were needed in the given week.
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