Kajal borrowed Rs. 6400 from Saloni at compound interest for 2 years. The rate of interest for first year being 10% p.a. and 8% per annum for the second year. Calculate the amount that Kajal has to return to Saloni after 2 years.
The ratio of Rita’s age to the age of her mother is 3 : 11. The difference of their ages is 24. What will be the ratio of their ages after 3 years?
Find the sum of all three-digit positive integers divisible by 7.
The monthly spending of Nidhi and Ritika is in a ratio 3:4. If one of them is spending Rs. 20 less than the other, then find the sum of their spendings.
If 6 times the 6th term of an A.P is equal to the 14 times the 14th term of A.P, what is the 20th times the 20th term of this AP?
A number N is chosen at a random from –5, –4, –3, –2, –1, 0, 1, 2, 3, 4, 5. Find the probability that |N| < 4.
Two students Rishu and Nazma appeared in a test. The probability that Rishu will qualify the test is 0.2 and that Nazma will qualify the test is 0.15. The probability that both will qualify the test is 0.075. Find the probability that both will not qualify the test.
Numbers 1 to 20 are marked on balls of equal size one on each and one ball is drawn at a random. Find the probability of getting a number divisible by either 3 or 4.
A box contains 12 red marbles, 14 green marbles, and 10 blue marbles. The size of each marble is different. Find the probability that the blue marble being selected is the biggest blue marble.
The ratio of the weight of four family members P, Q, R, and S is 5:4:3:2. If Q’s weight is 10 kg more than R’s weight, then what is the weight of S?
A school has the seats for commerce, medical, and arts in the ratio 9:5:8. There is a proposal to increase the seats by 50%, 40%, and 75% respectively. Find the ratio of increased seats.
In what time would Rs. 2250 at 4% p.a. yield the same interest as Rs. 1200 at 5% p.a. in 3 years?
