Exams

The mean of 10 observations is 17. One more observation is included and the new mean becomes 16. The 11th observation is

The sum of three consecutive even numbers is 42. Find the middle number.

Divide 3740 in three parts in such a way that half of the first part, one-third of the second part and one-sixth of the third part are equal.

A bag contains coins of denominations Rs.1, Rs.5 and Rs.10. Assuming there are equal number of Rs.1, Rs.5 and Rs.10, what will be the total number of coins in the bag be if the total money is Rs. 368?

If the zeroes of the polynomial x2 - ax + b are 3 and 4, then 'a' and 'b' are respectively equal to

A lemon kept in water in a glass tumbler appears to be bigger than its actual size when viewed from the sides. This is because of

Dipali bought a set of cups for Rs. 375, but then had to sell it later to clear old stocks for Rs. 345. What is the percentage of loss that she incurred?

If cost price of 5 cars is equal to selling price of 4 cars. Find the percentage of profit or loss?