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.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 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.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?

From all two-digit numbers with either digit 1, 2, or 3 one number is chosen i) What is the probability of both digits being the same? ii) What is the probability of the sum of the digits being 4 ?

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 box contains four slips nümbered '1,2,3,4' and another box contains two slips numbered 1,2 If one slip is taken from each, what is the probability of the sum of numbers being odd? What is the probability of the sum being even?

A box cointains paper slips numbered from 1 to 4 Another box contains slips numbered from 2 to 4 If one slip is taken from each box, a) Write all the possible pairs b) What is the probạbility that the product of numbers in each slip is a multiple of '3 ?' c) What is the probability that one number is square of the other?

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?

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.