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Please solve it. As soon as possible. ________________________________________________

Please solve it.
As soon as possible.
________________________________________________                                                                                                                                                     

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Grade:11

2 Answers

Arun
25758 Points
2 years ago
Dear student
 
what do you mean by x1x2x3. I did not get it. Please elaborate this. I will be happy to help you.
Vikas TU
14149 Points
2 years ago
Dear student 
There are only three possible ways to reach 
(0,0) to(1,1)
→3 up 3 down and 1 forward =
6!/3!2!
→1 up and 3 forward 2 backward =
6!/3!2!
→2 up 1 down and 2 forward 1 backward =
6!/3!3!
Adding the 3 
we get
6!/3!2! + 6!/3!2! + 6!/3!3! = 140
   
 
this the no. of ways is 
→140 × 3 = 420
                  

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