How many different zip codes can be made with the digits 0 9 if no - ProProfs Discuss

# How many different zip codes can be made with the digits 0-9 if no digit is used more than once and the first digit is not 0? A zip code contains 5 digits.

A. 9 x 8 x 7 x 6 x 5
B. 9 x 9 x 8 x 7 x 7
C. 9 x 9 x 7 x 6
D. 9 x 9 x 8 x 7 x 6

This question is part of Pre NET 2015 Computer Science by Taleem Tutor
Asked by Ejazmoaz, Last updated: Mar 25, 2020

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2 Answers

#### John Adney

John Adney

Answered Oct 27, 2017

D (9 9876) this is because this can happen in two different ways. First by choosing from 9 digits 5 and then in how many ways one can arrange 0 if it must not start.

i.e P(9,5) 9

So the correct answer is D

#### John Smith

John Smith

Answered Jul 13, 2017

9 x 9 x 8 x 7 x 6

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