MEDIUM
VITEEE
IMPORTANT
Earn 100

Ramesh has friends. In how many ways can he invite one or more of them at a dinner?
(a)
(b)
(c)
(d)

50% studentsanswered this correctly

Important Questions on Permutations & Combinations
MEDIUM
VITEEE
IMPORTANT
From gentlemen and ladies a committee of five is to be selected. Find the number of ways in which the committee can be formed so that gentlemen are in majority.

HARD
VITEEE
IMPORTANT
pens are to be selected from pens of colours (pens of each colour being available any number of times), then find the total number of selections.

HARD
VITEEE
IMPORTANT
Number of ways of selecting three squares on a chessboard so that all the three be on a diagonal line of the board or parallel to it is

MEDIUM
VITEEE
IMPORTANT
The number of arrangements of the letters of the word in which the two 's do not appear adjacently is

MEDIUM
VITEEE
IMPORTANT
How many different -letter words can be formed with the letter of word when and are always to be excluded?

MEDIUM
VITEEE
IMPORTANT
The number of three-digit numbers having only two consecutive digits identical is

MEDIUM
VITEEE
IMPORTANT
If all the letters of the word are arranged in all possible manner as they are in a dictionary, then the rank of the word is

MEDIUM
VITEEE
IMPORTANT
The total number of ways in which men and women can be arranged in a line so that no women are together is
