Quantitative Aptitude - Arithmetic Ability Questions

The mean deviation of the data 3, 10, 10, 4, 7, 10, 5 is :

A boy running at 10/9 th of his actual speed covers 39 km in 2 hours 20 minutes and 24 seconds. Find the actual speed of the boy (approx.)

The selling price of an item inclusive of a 10% profit was Rs.440. What would be the percentage loss if the item was sold for Rs. 370?

If x + y = 12 and x2 + y2 = 94, then xy is 

Out of the 60 students of a class, 29 took Mathematics, 32 took Biology and 8 took none of the two subjects. How many students took both Mathematics and Biology?

In the following question, select the odd letter from the given alternatives.

If x = 3+13, then the value of x-12642x-1x-233 is

A, B and C invest to start a restaurant. The total investment was Rs 3 lakhs. B invested Rs 50,000 more than A and C invested Rs 25,000 less than B. If the profit at the end of the year was Rs 14,400 then what is C's share of the profit (in Rs)?