Last Updated On [03-11-2023]
If 
is the number of ways in which a person can walk up a stairway which has 7 steps if he can take 1 or 2 steps up the stairs at a time, then the value of 
is
If is the number of ways in which a person can walk up a stairway which has 7 steps if he can take 1 or 2 steps up the stairs at a time, then the value of is
Question ID - 153649 :-
If is the number of ways in which a person can walk up a stairway which has 7 steps if he can take 1 or 2 steps up the stairs at a time, then the value of is
|
If |
|
(7)
Then we must have If
If
If
If
Hence total number of ways
|
denotes the number of times he can take unit step and 
denotes the number of times he can take 2 steps, then 
,
, the steps will be 1 2 2 2
number of ways
, the steps will be 1 1 1 22
number of ways
, the steps will be 111112
number of ways 
, the steps will be 1 1 1 1 1 1 1
Next Question :
|
Let |
denotes the number of ways in which three people can be selected out of 
people sitting in a row, if no two of them are consecutive. If,
then the value of 
isView Topper Answer
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