Questions
Six X's have to be placed in the square of the figure such that each row contains atleast one 'X'. In how many different ways can this be done?
Remember concepts with our Masterclasses.
80k Users 60 mins Expert Faculty Ask Questions
a
28
b
27
c
26
d
None of these
Ready to Test Your Skills?
Check Your Performance Today with our Free Mock Tests used by Toppers!detailed solution
Correct option is C
In all, we have 8 squares in which 6 'X .have to be placed and it can be done in 8C6=28But this includes the possibility that either the top or horizontal row does not have any X. Since, we want each row must have atleast one .x, these two possibilities are to be excluded.Hence, required number of ways = 28 - 2 = 26Similar Questions
The total number of 5-digit numbers of different digits in which the digit in the middle is the largest is
799 666 8865
support@infinitylearn.com
6th Floor, NCC Building, Durgamma Cheruvu Road, Vittal Rao Nagar, HITEC City, Hyderabad, Telangana 500081.
free study material
JEE
JEE Mock Tests
JEE study guide
JEE Revision Notes
JEE Important Questions
JEE Sample Papers
JEE Previous Year's Papers
NEET
NEET previous year’s papers
NEET important questions
NEET sample papers
NEET revision notes
NEET study guide
NEET mock tests
Popular Books
HC Verma Part 1HC Verma Part 2RS AgarwalRD SharmaLakhmir SinghDK GoelSandeep GargTS GrewalNCERT solutions
Class 12 NCERT SolutionsClass 11 NCERT SolutionsClass 10 NCERT SolutionsClass 9 NCERT SolutionsClass 8 NCERT SolutionsClass 7 NCERT SolutionsClass 6 NCERT Solutions
