juile5251 juile5251
  • 19-04-2018
  • Mathematics
contestada

How many 4-digit pin numbers can be made that contain a letter first, followed by 3-digits?

Respuesta :

musiclover10045
musiclover10045 musiclover10045
  • 19-04-2018
there are 26 letters in the alphabet, so 1st digit can be 1 of 26

 there are 10 numbers from 0-9, so the 2nd, 3rd and 4th digits can be 1 of 10 each
 
total combinations = 26 * 10 * 10 * 10 = 26,000


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