CAT 2007: Quantitative Questions a Day 101 to 133 - The Discussions

Superstar

The part B has answer as (c) 41

The part A answer according to me seems to be b) 36

Although it is too tough to crack but I am taking an educated guess and think that I am correct.

Aarav · 10:24 AM

Are mods and people with administrative rights not looking at the quant section? A request was sent yesterday to make this thread sticky.

Please do the needful. Also if possible transfer the QQAD poll to this thread

Bhayanak Maut

Part B
My Appraoch ..

The no of ways for selecting Sunit is the same as tht of Pratyush...
Also no of ways for selectin both Viks n Kaizen will be even ..
now only 1 way is odd i.e. leavin all these names n selecting those 5 people....

From the options only 1 is odd....
i.e.41
wht say..?

I kno...this is not at all recommended..but this is wht struck me first ...

**nikhilkulk**

Quote:

Originally Posted by Aarav

Are mods and people with administrative rights not looking at the quant section? A request was sent yesterday to make this thread sticky.

Please do the needful. Also if possible transfer the QQAD poll to this thread

It is a sticky now

I don't really know if transferring polls is possible. Have forwarded a request to the admins. Lets see..

~Nikhil

prabal987

In the ques regarding selection, the cases are as follows
V,K both S,P neither -- 5C3 =10
V,K both S,P either -- 5C2*2C1 = 20
V,K neither S,P either -- 5C4*2C1 = 10
V,K neither S,P neither -- 5C5 = 1

Total ways = 41

prabal987

In the ques regarding travelling from one point to another no. of ways are
3 step -- 2*3C1 = 6
5 step no repetition = 2*3C1 = 6
5 step with only the side next to starting vertex repeated = 3*6 = 18
5 step with the side next to the side attached to vertex = 2*6 = 12
5 step with the side attached to diagonally opposite vertex = 1*6 = 6

Total ways = 48

pratyush_sinha

Ans a

getting 30 as answer.

explanation--

for
step 1 ---0 ways
step 2--- 0 ways
step 3 --- 6 ways
step 4 ---0 ways
step 5--- 24 ways (12 + 6 +6)

ans b

41

Aarav

Part B has been correctly solved by most of you

The answer of Part A is also there on the thread, we will just stop short from announcing it ... please figure out yourself.

We just wanted to ask if you people are liking the new format of Part (A) and Part (B) from the same topic, though it makes life a lil tough for us to get both the answers in the same set of options. If you have some suggestions, please feel free to express

sunit_chotu

Quote:

Originally Posted by Aarav

Part B has been correctly solved by most of you

The answer of Part A is also there on the thread, we will just stop short from announcing it ... please figure out yourself.

We just wanted to ask if you people are liking the new format of Part (A) and Part (B) from the same topic, though it makes life a lil tough for us to get both the answers in the same set of options. If you have some suggestions, please feel free to express

The new format of part A and part B from the same topic is really a good initiative where we get a chance to focus on that topic a lot more and it helps a lot to know one's forte and weak area. Why do u need to put the answer option for both in one set of answer option only? I think it wud be better if both the answer options are separate. Thanks for the pain u guys take to frame it.

sunit_chotu

Quote:

Originally Posted by Aarav

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(Part B)
A committee of 5 is to be chosen from a group of 9 people. How many ways it can be done if Vikram and kaizen must serve together or none at all, and Sunit and Pratyush refuse to serve with each other?

(a) 40 (b) 36 (c) 41 (d) 30 (e) 48

Hey Aarav/Vineet Thanks for this yaar (see above in red). This brought a smile on my face the moment I saw the question in the morning.