Question
The income of P is 5/7th of the income of Q
and income of R is 60% more than the income of Q. Income of Q is Rs.21000 and expenditure of P is 20% of the expenditure of R. If R saves 25% of his income, then find the savings of P. TYPE 21Solution
Income of Q = Rs.21000 Income of P = 5/7 × 21000 = Rs.15000 Income of R = (160/100) × 21000 = Rs.33600 Savings of R = 33600 × (25/100) = Rs.8400 Expenditure of R = 33600 - 8400 = Rs.25200 Expenditure of P = (20/100) × 25200 = Rs.5040 Savings of P = 15000 - 5040 = Rs.9960
If a + 1/a = -2 then the value of a1000 + a- 1000 is
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