Official Quant thread for CAT 2013

MBA CAT 2024
21726
@iLoveTorres said:
bro it should be 7/52 n not 7/50.. if i am wrong kindly correct me
nahi 7/50 hi hoga....
@techsurge said:
13c1*7c1/26c27/25
Gun
sale darata hai meko.... Gun
21727
@audiq7 mera logic kahan galat hai conditional probability se kiya hai
21728

a set of 15 different words are given . in how many ways is it possible to choose a subset of not more than 5 words ?

4944
4^15
15^4
4943
21729
@audiq7 said:
bhai mere.. pehla banda mila hai tu muze jo 7/50 keh raha hai.. in succession hi tha. u sure?
In succession does not mean order fixed as red and then blue. Just means 1 at a time. Still need to consider both cases RB and BR and hence should be 7/25 I feel.

regards
scrabbler
21730
@raopradeep said:
a set of 15 different words are given . in how many ways is it possible to choose a subset of not more than 5 words ?
4944
4^15
15^4
4943
15c1+15c2+15c3+15c4+15c5
15+ 105 + 420+1365+3003
last digit 3 hoga islye only 4th satisfy
21731
@raopradeep said:
a set of 15 different words are given . in how many ways is it possible to choose a subset of not more than 5 words ?49444^1515^44943
21732
@techsurge said:
15c1+15c2+15c3+15c4+15c515+ 105 + 420+1365+3003last digit 3 hoga islye only 4th satisfy
oa is 4944
kya 15c0 be count karenge kya ?

21733
@iLoveTorres said:
bhai kya answer aaya it is 4944

21734
@scrabbler said:
In succession does not mean order fixed as red and then blue. Just means 1 at a time. Still need to consider both cases RB and BR and hence should be 7/25 I feel.regardsscrabbler
waha pe likha tha pehle red and then blue. sry mene wo mention nahi kiya Q mein.

@venomizer ne diya tha aaj CMAT isliye shayad usne thik se interpret kar liya.
21735
@raopradeep kaise fir select kaise hua ???
21736
@raopradeep said:
a set of 15 different words are given . in how many ways is it possible to choose a subset of not more than 5 words ?
4944
4^15
15^4
4943
15c1+15c2+15c3+15c4+15c5
21737
@audiq7
21738
@raopradeep said:
oa is 4944kya 15c0 be count karenge kya ?
by the rule a null set is a subset.. so you should include it in my opinion.. hope @scrabbler bhai provides some reason to it being selected or not selected
21739
@techsurge 15c0 hoga to 4944 aayega question me bola hai not more than 5 but selecting 0 items doesnt make subset i think
21740
@techsurge said:
@audiq7
hmm
mene kya kiya?? dunno hmm
21741
@iLoveTorres said:
by the rule a null set is a subset.. so you should include it in my opinion.. hope @scrabbler bhai provides some reason to it being selected or not selected
if null set is subset than it will be okay
21742
@audiq7 said:
13 red balls, 7 blue balls and 6 yellow balls are present in the box. What is the probability that 2 balls are selected such that 1 ball is red and the other blue?
13c1*7c1/26c2 ?
21743
@iLoveTorres said:
by the rule a null set is a subset.. so you should include it in my opinion.. hope @scrabbler bhai provides some reason to it being selected or not selected
Haan technically it is...:( Shady lagta hai but...

regards
scrabbler
21744
@raopradeep said:
a set of 15 different words are given . in how many ways is it possible to choose a subset of not more than 5 words ?49444^1515^44943
4944 ?

15c0 + 15c1 + .........15c15 - 15c6 - 15c7 - 15c8 - .......15c15
15c1 + 15c2 + 15c3 + 15c4 + 15c5 = 4944
21745
@ScareCrow28 said:
48?
kaise kiya ?