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

Redeem

Probability

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
User avatar
Senior | Next Rank: 100 Posts
Posts: 65
Joined: Mon Mar 07, 2011 12:27 am
Thanked: 6 times

Probability

by 6983manish » Tue Mar 15, 2011 9:57 pm
A fair sided die labeled 1 to 6 is tossed three times. What is the probability the sum of the 3 throws is 16?
A) 1/6
B) 7/216
C) 1/36
D) 9/216
E) 11/216
Top
Source: — Problem Solving |
User avatar
Legendary Member
Posts: 1101
Joined: Fri Jan 28, 2011 7:26 am
Thanked: 47 times
Followed by:13 members
GMAT Score:640

by HSPA » Tue Mar 15, 2011 10:34 pm
16 = 5+5+6 or 6+6+4

Prob : getting a given number out of six number = 1/6

5_5_6:
Number of ways of arranging 3 elements with 2 alike = 3!/2! = 3
probability = 3/216

6_6_4:
Similar here : 3/216

So (2*3)/216 = 1/36

Is it C....
Top
Post new topic Post Reply
• Page 1 of 1