Question
Rohit invested a certain amount at a simple interest
rate of r% per annum, which increased to 180% of the original amount over 5 years. If Rs. 2500 is invested at the same simple interest rate (r% p.a.) for 2 years, what will be the interest earned?Solution
Let the sum invested be Rs. 'P' Therefore, interest earned in 5 years = 1.8P - P = Rs. 0.8P ATQ; 0.8P = (P X r X 5) ÷ 100 Or, r = 80 ÷ 5 Or, r = 16 So, required interest earned = (2500 X 16 X 2) ÷ 100 = Rs. 800
If n(A) = 25, n(B) = 40 and n(A ∪ B) = 50, then n(A ∩ B) equals
A bag has balls of three colours. It has 8 red balls, x green balls and y blue balls, If probability of picking one green ball and that of picking one b...
A basket contains 8 pink, 12 violet, and 5 indigo balls. If 2 balls are picked at random without replacement, find the probability that the first ball i...
A bag contains 6 blue, 9 yellow and 15 white balls. Two balls are randomly drawn from the bag, what is the probability that a blue and a white ball are ...
There are three types of maggi masala maggi, aata maggi and vegetable maggi in a bag. The probability of picking a vegetable maggi at random is 6/11. Th...
A basket contains ‘x’ red apples and 12 green apples. If the probability of selecting a red apple is 2/5, then find the probability that two apples ...
Bag X contains 2 red balls and 6 blue balls, whereas bag Y contains 3 red balls and 2 blue balls. One ball is drawn at random from X and transferred in...
A bag contains 3 black balls, 7 red balls and 5 white balls. Two balls are drawn simultaneously. Find the probability that both the balls are of same c...
- 18 defective pieces of keyboards got mixed with 165 pieces of non-defective keyboards. A customer comes and buys one keyboard. Find the probability of the ...
A bag has ((x - 1)) red, ((x + 2)) green and ((x + 5)) yellow balls. Find the probability of taking, without replacement, out 2 red, 1 green and 2 yell...
Relevant for Exams:
