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Lesson 2 of 4 · Two pies / pie + table

Amount from share

DI: Pie Charts · for IPMAT Indore, IPMAT Rohtak and JIPMAT

The exam method

  1. Changes. new amount = old share x old total x (1 + rate); never apply the rate to the share alone.

Worked examples

Example 3Typical

College P has 18% of 12,000 students; 20% of the 5,000 female students are in P. Ratio of males to females in P?

Formulas you need

Amount in pie k=%k100×Tk\text{Amount in pie } k = \dfrac{\%_k}{100} \times T_k

amount in pie 1amount in pie 2=%1×T1%2×T2\dfrac{\text{amount in pie 1}}{\text{amount in pie 2}} = \dfrac{\%_1 \times T_1}{\%_2 \times T_2}

Watch out

  • Largest share is not largest amount when the totals differ.

Picked from the Two pies / pie + table note for this micro-concept automatically. The whole note: Two pies / pie + table.