Latest TCS Aptitude Question SOLUTION: How many vehicle registration plate numbers can be formed with digits 1,2,3,4,5 (no digits being repeated) if it is given that the registration number can have 1 to 5 digits?

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How many vehicle registration plate numbers can be formed with digits 1,2,3,4,5 (no digits being repeated) if it is given that the registration number can have 1 to 5 digits?

Asked In TCS aditi agnihotri (8 years ago)

Unsolved Read Solution (5)

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Read Solution (5) :

akhila  (8 years ago)

here it is not given that of how many no's should be the plate.so
single digit no; 5=5
double digit no;5*4=20
three digit:5*4*3=60
four digit;5*4*3*2=120
five digit;5*4*3*2*1=120
ANS. 325

Is this solution Helpfull? Yes (34) | No   

geethapavani  (8 years ago)

It is given that registration number can have 1 to 5 digits.so it is clear that the number plate can contain either 1 or 2 or 3 or 4 or 5 digits.possibility for 1 digit is 5
for 2 digits 5 x 4 =20
for 3 digits 5 x 4 x 3 =60
for 4 digits 5x4x3x2 =120
for 5 digit 5x4 x3x2=120 ways.totally 325

Is this solution Helpfull? Yes (5) | No   

sarang pandey  (8 years ago)

five digits _ _ _ _ _ since no repetition allowed so
5 * 4 * 3 * 2 * 1
so answer is 120.

Is this solution Helpfull? Yes | No (9)  

Reethu gali  (8 years ago)

5P5=5!/(5-5)!=5!=5*4*3*2*1=120

Is this solution Helpfull? Yes | No (6)  

mahaboob basha  (8 years ago)

in 5 digit number first by 5 ways
second by 4 ways
3rd by 3 ways
4th by 2 ways
last by 1 way so answer=5*4*3*2*1=120

Is this solution Helpfull? Yes | No (6)  

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