Permutation and CombinationHard
Question
In an examination, a candidate is required to pass in all the four subjects he is studying. The number of ways in which he can fail is
Options
A.4P1 + 4P2 + 4P3 + 4P4
B.44 - 1
C.24 - 1
D.4C1 + 4C2 + 4C3 + 4C4
Solution
Number of ways he can fail is either one or two, three or four subject then total of ways.
4C1 + 4C2 + 4C3 + 4C4 = 24 - 1
4C1 + 4C2 + 4C3 + 4C4 = 24 - 1
Create a free account to view solution
View Solution FreeMore Permutation and Combination Questions
Passengers are to travel by a double decked bus which can accommodate 13 in the upper deck and 7 in the lower deck. The ...8 chairs are numbered from 1 to 8. Two women & 3 men wish to occupy one chair each. First the women choose the chairs fr...Shubham has to make a telephone call to his friend Nisheeth, Unfortunately he does not remember the 7 digit phone number...5 Questions are asked in a question paper. Out of which two questions can be solved by two- two methods, two question by...The number of words which can be formed by taking two same and two different letters from the letters of the word ′...