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a license plate has 3 letters and 3 digits in that order a witness to hit a run accident saw the first two letters and the last digit.if the letters and the digits can be repeated how many license plates must be checked by the police to find the culprit?
Read Solution (Total 4)
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- since one letter and two digit place left so
26*10*10=2600
- 12 years agoHelpfull: Yes(37) No(3)
- witness saw two letters and one digit so,toyal no of letters is 26
one letter permutation is 26 and two digit permutation is 10*10
so total 26*10*10=2600;
- 12 years agoHelpfull: Yes(5) No(1)
- first,second are letters and last is digit,rest are not knows
first block = 3
2nd block = 3
6th block = 3
3rd,4rth,5th= 6 ways each
so tatal number of plates = 3 x 3 x 6 x 6 x 6 x 3
= 5832 plates (ans) - 12 years agoHelpfull: Yes(3) No(22)
- ------ in this 1st 2nd and last are fixed so alphabets remaining are 24 as two are fixed and didits remaining are 9 as one digit is fixed so 24*9=216
- 12 years agoHelpfull: Yes(0) No(6)
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