Lesson 7 of 8 · Paragraph data caselet

Difference

DI: Caselets · for IPMAT Indore, IPMAT Rohtak and JIPMAT

Worked examples

Example 1Sitter

Six shopkeepers sold ruled notebooks: P 370, Q 290. Their totals (blank + ruled) are P 550 and Q 680. What is the average number of blank notebooks of P and Q?

Example 3Easy

In June a shop sold 5920 pens and pencils, in the ratio pencils : pens = 81 : 67. In July the difference between pencils and pens was 1500, with ratio 241 : 166. How many pens were sold in June and July together?

Formulas you need

$\text{larger} = \frac{\text{total} + \text{difference}}{2}, \quad \text{smaller} = \frac{\text{total} - \text{difference}}{2}$

$\text{with ratio } a:b \ (a>b) \text{ and difference } d: \ \text{larger} = d \times \frac{a}{a-b}$

Picked from the Paragraph data caselet note for this micro-concept automatically. The whole note: Paragraph data caselet.