Brother and sister both appear for an interview. The probability of the selection of brother is 1/8 while the probability of rejection of sister is 4/5. What is the probability that only one of them is selected ?

A shopkeeper marks his books at 25% above the cost price. Due to slump in the market, his cost reduces by 5%. And then,to boost his sale, he offered a discount of 8% due to which sales goes up by 25%. Compute the change in the shopkeepers profit.

Tom's salary is 150% of John’s salary. John’s salary is 80% of Steve’s salary. What is the ratio of Steve's salary to Tom’s salary ?

Two successive discounts of 8% and 12% are equal to a single discount of:

There are six teachers. Out of them, two teach physics, other two teach Chemistry and the rest two teach Mathematics. They have to stand in a row such that Physics, Chemistry and Mathematics teachers are always in a set. The numberof ways in which they can do, is :

25,000/- is borrowed at compound interest at the rate of 3% for first year, 4% for 2nd year and 5% for 3rd year. Find the amount to be paid after 3 years.

Five years ago, the average age of A,B,C and D was 45 years. By including X in the present lot their present average changes to 49 years. What is the present age of X?

X and Y are running towards each other from their houses. X can reach Y’s house in 25 minutes which is half the time taken by Y to run from his house to X’s house. If the two start to run towards each otherat the same time, then how much more time it will be required by Y to reac…

Which of the following sets of numbers can be used as the lengths of the sides of a triangle ?