Latest Wipro Aptitude Question SOLUTION: A software engineer creates a LAN game where an 8 digit code made up of 1,2,3,4,5,6, 7,8 has to be decided on as a universal code. There is a condition that each number has to be U

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A software engineer creates a LAN game where an 8 digit code made up of 1,2,3,4,5,6,
7,8 has to be decided on as a universal code. There is a condition that each number has to be
Used and no number can be repeated. What is the probability that first 4 digits of the code are even number?
a)1/70 b)1/840 c)1/8 d)1/40320

Asked In Wipro RABIRANJAN KUMAR SINGH (7 years ago)

Unsolved Read Solution (8)

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Read Solution (8) :

Aakash kapur  (7 years ago)

total no of ways is 8!.
for finding even nos at last 4 digit s ways are 4!
and that for odd is 4!
so it can be done in 4*3*2*1*4*3*2*1/8*7*6*5*4*3*2*1
ie 4!*4!/8!

Is this solution Helpfull? Yes (20) | No   

aashna  (7 years ago)

so it can be done in 4*3*2*1*4*3*2*1/8*7*6*5*4*3*2*1
ie 4!*4!/8!

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Ajith Kumar  (7 years ago)

option:a is correct

Is this solution Helpfull? Yes (5) | No (2)  

surbhi barnwal  (6 years ago)

a) 1/70
8!/4!*(8-4)!

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SravaniSomu  (5 years ago)

a)1/70
Total no of possible ways are 8!
The total number of possible ways to find even numbers at the last 4 digits are 4!
The total number of possible ways to find odd numbers at the last 4 digits are 4!
So, the probability that the first 4 digits of the code are even number = 4!*4!/8! = 1/70

Is this solution Helpfull? Yes (2) | No   

Abhijeet Das  (5 years ago)

4*3*2*1*4*3*2*1/8*7*6*5*4*3*2*1
ie 4!*4!/8!
so the answer will be (a)1/70

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Shivam jaiswal  (7 years ago)

5,3,4,?,38

Is this solution Helpfull? Yes | No (2)  

nagalakshmi  (4 years ago)

(4! *4!)/8!= 1/70

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