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The subsets of the set {w, x, y} are {w}, {x}, {y}, {w, x}, {w, y},

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Re: The subsets of the set {w, x, y} are {w}, {x}, {y}, {w, x}, {w, y},  [#permalink]

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New post 02 Jan 2019, 05:17
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UNSTOPPABLE12, Happy to help! :-)

Also, another tip for getting a glimpse of the best action on the forum would be to "follow" some mods, experts and your favorite answer writers. (By pressing the follow button below the profile pic of the user you want to follow) That way you get notifications whenever a new post is made and can be a part of more discussions than when you venture out on your own on the forums.

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Re: The subsets of the set {w, x, y} are {w}, {x}, {y}, {w, x}, {w, y},  [#permalink]

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New post 02 Jan 2019, 17:38
JDPB7 wrote:
The subsets of the set {w, x, y} are {w}, {x}, {y}, {w, x}, {w, y}, {x,y}, {w, x, y}, and { } (the empty subset).

How many subsets of the set {w, x, y, z} contain w?

(A) Four
(B) Five
(C) Seven
(D) Eight
(E) Sixteen


for set (w,x,y,x); the subsets containing w would b
(w),(wx),(wy), ( wz), ( wxy,wzx,wyz)(wxyz); 8
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Re: The subsets of the set {w, x, y} are {w}, {x}, {y}, {w, x}, {w, y},  [#permalink]

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New post 04 Mar 2019, 22:34
Sets containing w:
can be a set of 1:
{w} 1 way
Can be a set of two:
{w, _} can be selected by 3c1 ways
ie. 3 ways
can be a set of three:
{w,_,_} can be selected by 3c2 ways
ie. 3 ways
can be set of four:
{w, x, y, z}
1 way
Adding 1+3+3+1= 8 ways
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Re: The subsets of the set {w, x, y} are {w}, {x}, {y}, {w, x}, {w, y},  [#permalink]

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New post 24 Nov 2019, 02:54
JDPB7 wrote:
The subsets of the set {w, x, y} are {w}, {x}, {y}, {w, x}, {w, y}, {x,y}, {w, x, y}, and { } (the empty subset).

How many subsets of the set {w, x, y, z} contain w?

(A) Four
(B) Five
(C) Seven
(D) Eight
(E) Sixteen

Hi Bunuel
The total subsets (16) of {w, x, y, z} are:
With w:
1. {w}
2. {w , x}
3. {w , y}
4. {w , z}
5. {w , x , y}
6. {w , y , z}
7. {w , x , z}
8. {w , x , y , z}

Without w:

1. {x}
2. {y}
3. {z}
4. {x,y}
5. {x,z}
6. {y,z}
7. {x,y,z}
8. {}

Is it ok?
Thanks__
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Re: The subsets of the set {w, x, y} are {w}, {x}, {y}, {w, x}, {w, y},  [#permalink]

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New post 24 Nov 2019, 03:10
Asad wrote:
JDPB7 wrote:
The subsets of the set {w, x, y} are {w}, {x}, {y}, {w, x}, {w, y}, {x,y}, {w, x, y}, and { } (the empty subset).

How many subsets of the set {w, x, y, z} contain w?

(A) Four
(B) Five
(C) Seven
(D) Eight
(E) Sixteen

Hi Bunuel
The total subsets (16) of {w, x, y, z} are:
With w:
1. {w}
2. {w , x}
3. {w , y}
4. {w , z}
5. {w , x , y}
6. {w , y , z}
7. {w , x , z}
8. {w , x , y , z}

Without w:

1. {x}
2. {y}
3. {z}
4. {x,y}
5. {x,z}
6. {y,z}
7. {x,y,z}
8. {}

Is it ok?
Thanks__


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Yes, that's OK.
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Re: The subsets of the set {w, x, y} are {w}, {x}, {y}, {w, x}, {w, y},   [#permalink] 24 Nov 2019, 03:10

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