TCS
Company
Numerical Ability
Permutation and Combination
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?
Read Solution (Total 5)
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- 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 - 9 years agoHelpfull: Yes(34) No(0)
- 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 - 9 years agoHelpfull: Yes(5) No(0)
- five digits _ _ _ _ _ since no repetition allowed so
5 * 4 * 3 * 2 * 1
so answer is 120. - 9 years agoHelpfull: Yes(0) No(9)
- 5P5=5!/(5-5)!=5!=5*4*3*2*1=120
- 9 years agoHelpfull: Yes(0) No(6)
- 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 - 9 years agoHelpfull: Yes(0) No(6)
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