Data Interpretation - Table Charts
The following table gives the sales of batteries manufactured by a company over the years.
Number of Different Types of Batteries Sold by a Company Over the Years (Numbers in Thousands)
| Year | Types of Batteries | |||||
| 4AH | 7AH | 32AH | 35AH | 55AH | Total | |
| 1992 | 75 | 144 | 114 | 102 | 108 | 543 |
| 1993 | 90 | 126 | 102 | 84 | 126 | 528 |
| 1994 | 96 | 114 | 75 | 105 | 135 | 525 |
| 1995 | 105 | 90 | 150 | 90 | 75 | 510 |
| 1996 | 90 | 75 | 135 | 75 | 90 | 465 |
| 1997 | 105 | 60 | 165 | 45 | 120 | 495 |
| 1998 | 115 | 85 | 160 | 100 | 145 | 605 |
| Required percentage |
|
|||||||
| = 34.26% | ||||||||
 34%. |
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The total sales (in thousands) of all the seven years for various batteries are:
For 4AH = 75 + 90 + 96 + 105 + 90 + 105 + 115 = 676
For 7AH = 144 + 126 + 114 + 90 + 75 + 60 + 85 = 694
For 32AH = 114 + 102 + 75 + 150 + 135 + 165 + 160 = 901
For 35AH = 102 + 84 + 105 + 90 + 75 + 45 + 100 = 601
For 55AH = 108 + 126 + 135 + 75 + 90 + 120 + 145 = 799.
Clearly, sales are maximum in case of 32AH batteries.
Required difference = [(84 - 45) x 1000] = 39000.
The percentages of sales of 4AH batteries to the total sales in different years are:
| For 1992 = |  |
75 | x 100 |  |
% = 13.81%. |
| 543 |
| For 1993 = | |
90 | x 100 | |
% = 17.05%. |
| 528 |
| For 1994 = | |
96 | x 100 | |
% = 18.29%. |
| 525 |
| For 1995 = | |
105 | x 100 | |
% = 20.59%. |
| 510 |
| For 1996 = | |
96 | x 100 | |
% = 19.35%. |
| 465 |
| For 1997 = | |
105 | x 100 | |
% = 21.21%. |
| 495 |
| For 1998 = | |
115 | x 100 | |
% = 19.01%. |
| 605 |
Clearly, the percentage is maximum in 1997.
From the table it is clear that the sales of 7AH batteries have been decreasing continuously from 1992 to 1997.