Latest TCS Aptitude Question SOLUTION: not geting it....Distribute 10 "different" pencils among 3 students??

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not geting it....Distribute 10 "different" pencils among 3 students??

Asked In TCS juhe rawat (11 years ago)

Unsolved Read Solution (15)

Is this Puzzle helpful?   (2)   (0) Submit Your Solution Permutation and Combination

Read Solution (15) :

DON  (11 years ago)

@juhe rawat
it is a simple formula based problem
ans is:9c2=36
(n-1)c(r-1)

Is this solution Helpfull? Yes (21) | No (10)  

bhumi goyal  (11 years ago)

There are 10 pencils.Let us assume these are 10 pencils is to be distributed among 3 students,so put two partitions in between these 10 pencils anywhere
/ / | / / / | / / / / /
now add these partitions to the pencils so total it becomes 12
nCr will be the number of ways where n = 12 (total object + partition),r = 2(number of partition)
So, 12C2 = 66.

Is this solution Helpfull? Yes (16) | No (4)  

Lavanya  (11 years ago)

this question is similar to finding number of functions that can be formed between two sets A and B .n(A)=10,n(B)=3..so..number of functions =3 power 10.

Is this solution Helpfull? Yes (10) | No   

ruthala ramsai  (11 years ago)

3^10

Is this solution Helpfull? Yes (9) | No (1)  

ankit  (10 years ago)

3^10
directly by formula r^n

Is this solution Helpfull? Yes (6) | No   

krittika  (11 years ago)

arrangement of 10 diffrnt pncil among 3 i.e 10p3=!n/n-r!=10!/7!=720

Is this solution Helpfull? Yes (5) | No (8)  

venkata satya kumar  (11 years ago)

is the answer is 120

Is this solution Helpfull? Yes (4) | No (4)  

satish  (11 years ago)

number of pencils is 10.
number of students is 3.

10c3 = 10*9*8/1*2*3 = 120

Is this solution Helpfull? Yes (3) | No   

m.v.manikanta prasad  (11 years ago)

10p3....as different pencils......think bro

Is this solution Helpfull? Yes (3) | No (1)  

venkata satya kumar  (11 years ago)

please submit the answer

Is this solution Helpfull? Yes (2) | No   

mithun mondal  (10 years ago)

it is a distributed permutation where n non distinct things to r distinct group
formula::(n-1)C(r-1)
9C2 =36 ans

Is this solution Helpfull? Yes (1) | No (1)  

priyanka banerjee  (10 years ago)

ans will be 3^10

Is this solution Helpfull? Yes (1) | No (1)  

M.Rama Srikanth  (11 years ago)

10C3=120 is the answer

Is this solution Helpfull? Yes | No (2)  

khila  (10 years ago)

10p3=720
10 different pencils among 3 students.so the total number of ways are 720

Is this solution Helpfull? Yes | No (1)  

hemant garg  (10 years ago)

10!/(2!*3!*5!)=2520

Is this solution Helpfull? Yes | No (1)  

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