Permutations an...

The number of all numbers that can be formed by using some or all of the digits 1, 3, 5, 7, 9 (without repetitions) is

The number of even numbers that can be formed by using all the digits 1, 2, 3, 4, and 5 (without repetitions) is

Find Rank of word ‘wife ‘among the words that can be formed with its letters and arranged as in dictionary is

The figures 4, 5, 6, 7, 8 are written in every possible order. The number of numbers greater than 56000 is

A coin is tossed n times, the number of all the possible outcomes is

The number of all three digit even numbers such that if 5 is one of the digits then next digit is 7 is

Numbers greater than 1000 but not greater than 5000 are to be formed with the digits 0, 1, 2, 3, 5, allowing repetitions, the number of possible numbers is

The number of significant numbers which can be formed by using any number of the digits 0, 1, 2, 3, 4 but using each not more than once in each number is

The number of different ways in which a man can invite one or more of his 6 friends to dinner is?