Question

The sale of electric bulbs on different days of a week is shown below:
Observe the pictograph and answer the following questions:
Can you find out the total earning of the week, if each bulb sells for 10/- for each bulb?

Answer 1

Hint: Using the given data, we can easily calculate the numerical values of sales of electric bulbs in each day because each diagram of bulb represents 2 bulbs. After finding the total sales of bulbs in the whole week we multiply the sale of total number bulbs by 10 to get the total earning of the week.

Complete step-by-step solution -

In this question, the pictograph of the sale of electric bulbs is given. First, convert the pictograph into the table of frequency as depicted by simply multiplying each diagram by 2.

Days	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
Number of Bulbs	12	16	8	10	14	8	18

The total sales number of bulbs in a week = sales on Monday + sales on Tuesday + sales on Wednesday + sales on Wednesday + sales on Thursday + sales on Friday + sales on Saturday
The total sales number of bulbs in a week = 12 + 16 + 8 + 10 + 14 + 8 + 18
Total number sales of bulbs in a week = 86.
Cost of one bulb = Rs. 10
Total earning of the week = total sales of number of bulbs \[\times \] cost of one bulb
Total earning of the week = $86\times \text{Rs}.10=\text{Rs}\text{.860}$.
Hence, the total sales of the week is Rs.860.

Note: Students must be careful while converting the pictograph into frequency table as one bulb diagram represents two bulbs sold as shown at the topmost right corner. If this factor is not taken into account, then the question will be wrongly solved by students.