Monday
March 30, 2015

Homework Help: math30

Posted by alejandro on Monday, August 5, 2013 at 2:00pm.

A security code used to consist of two odd digits, followed by four even digits. To allow more codes to be generated, a new system uses two even digits, followed by any three digits. If repeated digits are allowed, the increase in the number of possible codes is____
Answer: Old code: 5x5x5x5x5x5=15325
New code: 5x5x10x10x10=25000
The increase in the number of codes is 9375.
I don't understand why they use 5's and 10's!!!Please somebody can explain me this!!!

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

math - 1. a door code is made up of six unique digits the last digit is 8. 2....
gemetry - An identification code is to consist of two letters followed by six ...
Math - 1.) A security code has seven characters. Each code begins with two ...
College probability and statistics - The current license plates in New York ...
math - I am thinking of a two-digit number in which the sum of the digits is 9 ...
math: probability - A locker combination has three nonzero digits, and digits ...
Math - An identification code is to consist of six letters followed by three ...
Math problems Help Please!!!!!! - i am a four-digit number with the digits in ...
Math problems - i am a four-digit number with the digits in order. my first two ...
MATH - What is my number if the hundreds digit is less than the tens digit and ...

Members