Two digits are chosen at random from the digits 1, 2, 3, …, 9, if the sum of the chosen digits is odd, find the probability that one of the chosen digit is 6.

Two consecutive drawings of a digit are made at random from the ten digits 0, 1, 2, …, 9. Find the probability that the product of the chosen digits is zero, given that the first drawn digit is replaced before the second drawing.

If a digit is chosen at random from the digits 1,\ 2,\ 3,\ 4,\ 5,\ 6,\ 7,\ 8,\ 9 , then the probability that the digit is even, is (a) 4/9 (b) 5/9 (c) 1/9 (d) 2/3

A determinant is chosen at random from the set of the determinants of order 2 with element 0 or 1 only. Find the probability that the determinant chosen is non-zero.

How many 3-digit even numbers can be formed from the digits 1, 2, 3, 4, 5, 6 if the digits can be repeated?

How many 2 digit even numbers can be formed from the digits 1, 2, 3, 4, 5 if the digits can be repeated?

How many 3-digit numbers can be formed from the digits 1, 2, 3, 4 and 5 assuming that  (i) repetition of the digits is allowed? (ii) repetition of the digits is not allowed?

Four digit number are formed by using the digits 1,2,3,4 and 5 wihout repeating any digit.Find the probability that a number chosen at random is an odd number.

If out of 20 consecutive whole numbers two are chosen at random, then find the probability that their sum is odd.

A number is chosen at random from the set 1,2,3 …150 and another number is chosen at random from the set 1,2,3….75 find the expected value of the product of the chosen number

How many two-digit even numbers can be formed from the digits 1,2, 3, 4, 5 if the digits can be repeated?