Q.
Six $x$ have to be placed in the square of the figure given, such that each row contains at least one $x$, this can be done in
A) 24 ways
B) 28 ways
C) 26 ways
D) 36 ways
Explanation
(c)
In 8 squares $6x$ can be placed in 28 ways but there are two methods in which there is no $x$ in first or last row.
$\therefore$ required number of ways=28-2=26
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.