Question

The sale of electric bulbs on different days of a week is shown below: Days Number of bulbs Monday Tuesday Wednesday Thursday Friday Saturday Sunday = 2 bulbs Observe the pictograph and answer the following questions: (i) How many bulbs were sold on Friday? (ii) On which day maximum number of bulbs were sold? (iii) If one bulb was sold at the rate of Rs 10, what was the total earning on Sunday? (iv) Can you find out the total earning of the week? (v) If one big cartoon can hold 9 bulbs. How many cartons were needed in the given week, more than 7, more than 8 or more than 9?

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Solution

(i) Number of figures of bulbs shown against Friday = 7 Given: 1 figure = 2 bulbs ∴ Total number of bulbs sold on Friday = 2 × 7 = 14 (ii) Sunday shows the maximum number of figure of bulbs, i.e., 9. ∴ On Sunday, maximum bulbs were sold. (iii) Numbers of figures of bulbs shown against Sunday = 9 ∴ Total number of bulbs sold on Sunday = 2 × 9 = 18 Given, the cost of each bulb = Rs. 10 ∴ Total earning on Sunday = Rs. 10 × 18 = Rs. 180 (iv) Total number of figures of bulbs shown throughout the week = 6 + 8 + 4 + 5 + 7 + 4 + 9 = 43 ∴ Total number of bulbs = 43 × 2 = 86 ∴ Total earnings of the week = Rs. 10 × 86 = Rs. 860 (v) Total number of bulbs = 86 Given that one big carton can hold 9 bulbs. Therefore, for holding 86 bulbs, we need $\frac{86}{9}=9\frac{5}{9}$ cartoons So, more than 9 cartons are needed.

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