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
Master | Next Rank: 500 Posts
Posts: 117
Joined: Mon Oct 27, 2008 5:08 pm
Thanked: 1 times

probability

by [email protected] » Wed Nov 12, 2008 9:01 am
A certain restaurant offers 6 kinds of cheese and 2 kinds of fruit for its dessert platter. if each dessert platter contains an equal numbr of kinds of cheese and kinds of fruit, how many different dessert platters could the restaurant offer?

Ans)27
Top
Source: — Problem Solving |
User avatar
Legendary Member
Posts: 2134
Joined: Mon Oct 20, 2008 11:26 pm
Thanked: 237 times
Followed by:25 members
GMAT Score:730

Re: probability

by logitech » Wed Nov 12, 2008 9:08 am
[email protected] wrote:A certain restaurant offers 6 kinds of cheese and 2 kinds of fruit for its dessert platter. if each dessert platter contains an equal numbr of kinds of cheese and kinds of fruit, how many different dessert platters could the restaurant offer?

Ans)27
Sophia,

so we can either have 1 cheese+1fruit combo OR 2 cheeses and 2 fruits combo

6c1 x 2c1 + 6c2 x 2c2 = (6 x 2) + (15 x 1) = 27

AcB means how many different B can we select out of A
LGTCH
---------------------
"DON'T LET ANYONE STEAL YOUR DREAM!"
Top
Master | Next Rank: 500 Posts
Posts: 114
Joined: Mon Oct 20, 2008 7:03 pm
Thanked: 4 times
Followed by:5 members

by jnellaz » Thu Nov 13, 2008 2:32 pm
6c1 x 2c1 + 6c2 x 2c2 = (6 x 2) + (15 x 1) = 27

Hey Logitech,

In your equation above, can you explain how 6c2 x 2c2 = (15 x 1)? I am not familiar with AcB expressions. Thx!
Top
User avatar
Legendary Member
Posts: 2134
Joined: Mon Oct 20, 2008 11:26 pm
Thanked: 237 times
Followed by:25 members
GMAT Score:730

by logitech » Thu Nov 13, 2008 2:50 pm
jnellaz wrote:6c1 x 2c1 + 6c2 x 2c2 = (6 x 2) + (15 x 1) = 27

Hey Logitech,

In your equation above, can you explain how 6c2 x 2c2 = (15 x 1)? I am not familiar with AcB expressions. Thx!
https://en.wikipedia.org/wiki/Combination

Read this and please let me know if you have any questions.
LGTCH
---------------------
"DON'T LET ANYONE STEAL YOUR DREAM!"
Top
Master | Next Rank: 500 Posts
Posts: 114
Joined: Mon Oct 20, 2008 7:03 pm
Thanked: 4 times
Followed by:5 members

by jnellaz » Fri Nov 14, 2008 6:36 am
As alway. thanks!
Top
Post new topic Post Reply
• Page 1 of 1