BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Combinations?

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Senior | Next Rank: 100 Posts
Posts: 32
Joined: Fri Feb 19, 2010 12:36 pm
Location: Pennsylvania
Thanked: 1 times

Combinations?

by tsmith93 » Mon Mar 15, 2010 1:55 am
To use a certain cash machine, you need a Personal Identification Code (PIC). If each PIC consists of two letters followed by one of the digits from 1 to 9 (such as AQ7 or BB3) or one letter followed by two digits (such as Q37 or J88), how many different PIC's can be assigned?
Top
Source: — Problem Solving |
Senior | Next Rank: 100 Posts
Posts: 33
Joined: Tue Jan 19, 2010 11:15 pm
Location: India
Thanked: 2 times

by [email protected] » Mon Mar 15, 2010 2:29 am
tsmith93 wrote:To use a certain cash machine, you need a Personal Identification Code (PIC). If each PIC consists of two letters followed by one of the digits from 1 to 9 (such as AQ7 or BB3) or one letter followed by two digits (such as Q37 or J88), how many different PIC's can be assigned?

number of possible combinations of PIC with 2 letters followed by 1 digit = 26 X 26 X 9 = 6084
number of possible combinations of PIC with 1 letters followed by 2 digits = 26 X 9 X 9 = 2106

Total = 6084 + 2106 = 8190
Top
Post new topic Post Reply
• Page 1 of 1