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Question
Observe the given data:
| Days of the week |
Mon | Tues | Wed | Thurs | Fri | Sat |
| Number of Mobile Phone Sets Sold |
50 | 45 | 30 | 55 | 27 | 60 |
- Draw a bar graph to represent the above given information.
- On which day of the week was the sales maximum?
- Find the total sales during the week.
- Find the ratio of the minimum sale to the maximum sale.
- Calculate the average sale during the week.
- On how many days of the week was the sale above the average sales?
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Solution
a. In order to construct a bar graph representing the above data, we follow the following steps:
Step I: Take a graph paper and draw two mutually perpendicular lines OX and OY. Call OX as the horizontal axis and OY as the vertical axis.
Step II: Along OX, mark days and along OY, mark number of mobile phone sets sold.
Step III: Along OX, choose the uniform (equal) width of the bars and the uniform gap between them, according to the space available for the graph,
Step IV: Choose a suitable scale to determine the heights of the bars, according to the availability of space. Here, we choose 1 small division to represent 5 mobile sets.
b. It is clear from graph that on Saturday the sales was maximum.
c. Total sale during the week = Sum of all the sales on each day
= 50 + 45 + 30 + 55 + 27 + 60
= 267
d. Minimum sale on Friday = 27
Maximum sale on Saturday = 60
∴ Required ratio = 27 : 60 = 9 : 20
e. Average sale = `"Total sale"/6`
= `267/6`
= 44.5
f. On Monday, Tuesday, Thursday and Saturday, i.e. 4 days the sale was above the average sale.
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