Three critics review a book. Odds in favour of the book are 5:2, 4:3 and 3:4 respectively for three critics. Find the probability that majority are in favour of the book.

Mean and variance of the binomial distribution is 4 and 3 respectively. Then ……….. is the probability for X = 6

Three machines A, B and C produce respectively 30%, 50% and 20% of the total number of items of a factory. The percentage of defective output of these machines are 1%, 4% and 3% respectively. If an item is selected at random, find the probability that the item is non-defective.

If a die is thrown 5 times. Then find the probability that an odd number will come up exactly three times.

Out of 3n consecutive integers, three are selected at random. Find the probability that their sum is divisible by 3.

A five digit number is formed by the digit 1,2,3,4 and 5 without repetition. Find the probability that the number formed is divisible by 4.

The relative permittivity and relative permeability of a medium are 3 and (4)/(3) respectively, the critical angle for this medium is

Mean and varience of 5 observations are 4.4 and 8.24 respectively . If three observations are 4,9 and 6, then find remaining observations.

A five digit number is formed by the digits 1, 2, 3, 4, 5 without repetition. Find the probability that the number is divisible by 4.

The ratio of the measures of three sides of a triangle is 4 : 2 : 3 and its perimeter is 36 cm. Find the area of this triangle.

Three students appear at an examination of mathematics. The probability of their success are 1/3,1/4,1/5 respectively. Find the probability of success of at least two.