Direction: Sales of books (in thousands} from six branches (B1, B2, B3, B4, B5, B6) of a publishing company are given below. Study the graph and answer the following questions.
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If the sale of books from the branch B2 increases by 30% and that from the branch B4 decreases by 10%, the approximate sale from all the six branches will
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- increase by 1·33%
- decrease by 1·67%
- remain same
- decrease by 1·33%
Correct Option: A
On the basis of given graph in question ,
The sale of books from the branch B2 = 40
After increases by 30% ,
| New sale of books from branch B2 = | = 52 thousand | 100 |
The sale of books from the branch B2 = 80
After decreases by 10% , then
| New sale of books from branch B4 = | = 72 thousand | 100 |
| New average sales = | 6 |
| New average sales = | thousand | 3 |
| Increase = | - 50 = | thousand | 3 | 3 |
| ∴ Percentage increase = | × 100 = | = 1.33% | 3 × 50 | 3 |
