Finding Number of Rectangle
Logic
Level
2
Number of rectangle possible in the below mentioned grid?
30
140
60
150
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1 solution
To find number of rectangle Select any two lines from horizontal lines and two lines from verticle lines The selected lines will always forms a rectangle - This can be done in 5c2 6c2(as their were 5 horizontal and 6 vertical lines . selection of two things from n things can be done in nc2 ways) 5c2 6c2=10*15=150