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From the set of numbers x, y, t, z and w, how many different
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19 Jun 2010, 15:48
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Difficulty:
55% (hard)
Question Stats:
59% (01:44) correct 41% (02:02) wrong based on 110 sessions
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From the set of numbers x, y, t, z and w, how many different combinations can we have without the t in them? Ex:. (x,y), (x), (w,z,y,x), etc and (x,y)=(y,x)
From the set of numbers x, y, t, z and w, how many different combinations can we have without the t in them? Ex:. (x,y), (x), (w,z,y,x), etc and (x,y)=(y,x)
A)10 B)14 C)15 D)16 E)30
There are 4 letter without t: x, y, z, and w, so: \(C^1_4+C^2_4+C^3_4+C^4_4=4+6+4+1=15\)
Re: From the set of numbers x, y, t, z and w, how many different
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10 Apr 2017, 17:09
Question is to find no of combinations of x,y,z,w
Choosing only 1 letter - 4C1 ways = 4 Choosing only 2 letter - 4C2 ways = 6 Choosing only 3 letter - 4C3 ways = 4 Choosing only 4 letter - 4C4 ways = 1
Total possible combinations = 4+6+4+1 = 15
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Re: From the set of numbers x, y, t, z and w, how many different
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18 Aug 2018, 10:56
Gusano97 wrote:
From the set of numbers x, y, t, z and w, how many different combinations can we have without the t in them? Ex:. (x,y), (x), (w,z,y,x), etc and (x,y)=(y,x)
A. 10 B. 14 C. 15 D. 16 E. 30
OA:C Set of numbers formed by using x, y,z and w Case 1 : Using 1 number only C(4,1) =4 Case 2 : Using 2 number only C(4,2) =6 Case 3 : Using 3 number only C(4,3) =4 Case 4 : Using 4 number only C(4,4) =1 Total cases :4+6+4+1=15
gmatclubot
Re: From the set of numbers x, y, t, z and w, how many different
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18 Aug 2018, 10:56
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59% (01:44) correct 
