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

Redeem

Counting

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Senior | Next Rank: 100 Posts
Posts: 89
Joined: Thu Aug 26, 2010 9:29 am
Thanked: 4 times

Counting

by danjuma » Wed Oct 06, 2010 10:51 am
A multiple choice test consists of 10 questions. Each question has 5 answer choices. In how many different ways can the test be completed if all the questions are answered?

1.50
2.500
3 5 to the 10th power
4.10 to the fifth power
5.5000
Top
Source: — Problem Solving |
User avatar
Community Manager
Posts: 991
Joined: Thu Sep 23, 2010 6:19 am
Location: Bangalore, India
Thanked: 146 times
Followed by:24 members

by shovan85 » Wed Oct 06, 2010 10:56 am
IMO C

first q can be answered in 5 ways.
2nd in 5 ways.
.
.
.
10th in 5 ways.

Total = 5*5*... 10 times
Top
User avatar
Master | Next Rank: 500 Posts
Posts: 307
Joined: Sun Jul 11, 2010 7:52 pm
Thanked: 36 times
Followed by:1 members
GMAT Score:640

by limestone » Fri Oct 08, 2010 1:35 am
IMO : C too

For each question, we are asked to pick 1 answer choice among 5.

Then No. of picking answer choice in each question is : 5P1 = 5

There're distinctive 10 questions, then the total no. of ways is : 5^10.
"There is nothing either good or bad - but thinking makes it so" - Shakespeare.
Top
Post new topic Post Reply
• Page 1 of 1