Permutation and CombinationHard
Question
Number of natural number upto one lakh, which contains 1,2,3, exactly once and remaining digits any time is -
Options
A.2940
B.2850
C.2775
D.2680
Solution
First fill 3 places by 1,2,3 in ways and then remaining one in 7 × 7 ways so total no. of ways
= 5P3 × 7 × 7 = 2940
= 5P3 × 7 × 7 = 2940
Create a free account to view solution
View Solution FreeMore Permutation and Combination Questions
Which of the following statement(s) is/are true :-...In a conference 10 speakers are present. If S1 wants to speak before S2 & S2 wants to speak after S3, then the number of...The number of ways in which three persons can dress themselves when they have 4 shirts. 5 pants and 6 hats between them,...Eleven members of a committee sit round a circular table. In how many ways can they sit so that the secretary and joint ...The number of ways in which six different prizes can be distributed among three children each receiving at least one pri...