There is one spot at one side of the cube, two on another side, three on the third side and so on. There are spots on all the six faces, in this order. An other cube which is marked in the same way is taken. What is the probability that the sum of the spots on the upper faces is 9?

There is one spot at one side of the cube, two on another side, three on the third side and so on. There are spots on all the six faces, in this order. An other cube which is marked in the same way is taken.What is the probability that the sum of the spots be one?

There is one spot at one side of the cube, two on another side, three on the third side and so on. There are spots on all the six faces, in this order. An other cube which is marked in the same way is taken. What is the probability that the sum of the spots be a prime number?

There is one spot at one side of the cube, two on another side, three on the third side and so on. There are spots on all the six faces, in this order. An other cube which is marked in the same way is taken.If both the cubes are thrown,what is the probability that the total number of spots on the upper faces is 6?

Two boxes contain tokens on which numbers 1,2,3,4 are written. One token is taken from each box. a) What is the probability of getting sum of the face numbers a prime number?

There are three coins. One is a two headed coin (having head on both faces), another is a biased coin that comes up heads '75 %' of the time and third is an unbiased coin. One of the three coins is chosen at random and tossed, it shows heads, what is the probability that it was the two headed coin?

A square is drawn by joining the mid points of the sides of a square. A third square is drawn inside the second square in the same way and the process is continued infinitely. If the side of the square is 10 cms, find the sum of the areas of all the squares so formed.

A rope of length 40 metres is cut into two pieces and two squares are made on the floor with them. The sum of the. area enclosed is 58 square meter. a) If the length of one piecce is taken as 'x', what is the. length of the other piece. b) What are the lengths of the sides of the squares? c) Write the. given fact about area as an algebraic equation. d) What is the length of each piece?

The perpendicular sides of a right angled triangle are 12 and 15 centimetres long. Another right angled triangle of the same area has one of the perpendicular sides 18 centimetres long. What is the length of the other?

Cost of a cubical shaped cake having one side 10 centimeter is 20 rupees. Cost of another cube shaped cake having one side 20 centimeter is 120 rupees. Which is more profitable to buy? Why?