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Total number of balls in the bag = 7 + 5 + 9 = 21 Probability that a red ball and a black ball are drawn = 7C1 × 5C1/21C2 = 7 × 5/210 = 1/6
A certain sum amounts to ₹22,494 in 7 years at x% per annum on simple interest. If the rate of simple interest per annum had been (x + 4) %, the amoun...
What sum will give Rs. 279 as the difference between simple interest and compound interest at 20% in 1year 6 months compounded half yearly?
A sofa of MRP 450 is available in Rs.90 cash down payment and 9 monthly equal installment of Rs.45 each. Find the rate of interest per annum.
What will be the ratio of simple interest earned on certain amount at the same rate of interest for 5 years and that for 10 years?
Vishal has certain sum of money with him. He invested 80% of the sum in scheme ‘X’ offering 15% p.a. simple interest for 8 years and received Rs. 20...
Shivam invested 24000 at 15% p.a. simple interest for ‘x’ months. If at the end of ‘x’ months, he received a total amount of Rs.26400. What is t...
Dinesh invested Rs. (P-500) at the rate of 27% per annum on simple interest and at the end of three years, he got Rs. 4860 as an interest. Pankaj invest...
A man deposited 25% of his salary to a bank which offers compound interest at the rate of 10% p.a. If the interest earned by him from the bank after 2 y...
A sum of money amounts to ₹13,200 after 3 years at a certain simple interest rate. If the principal was ₹10,000, what was the rate of interest per a...
The interest earned when a sum is invested at simple interest of 25% p.a., for 3 years, is Rs. 9000. What will be the total amount received after 2 year...
