Latest TCS Aptitude Question SOLUTION: A bag contains 5 five rs coins , 8 8 rs coins and 7 7 rs coins .If 4 coins are drawn from the bag at random then find the odds in favor of the draw yeildng the maximum possible amo

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(#M40029903) TCS question Keep an EYE

A bag contains 5 five rs coins , 8 8 rs coins and 7 7 rs coins .If 4 coins are drawn from the bag at random then find the odds in favor of the draw yeildng the maximum possible amount
option
a) 1:968
b) 968:969
c) 1:909
d) 969:968

Asked In TCS Dipika Jha (10 years ago)

Unsolved Read Solution (9)

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ABHRA  (10 years ago)

*** wrong question .....
**corrected one will be :
Q. . A bag contains 5 five-rupee coins, 8 two-rupee coins and 7 one-rupee coins. If four coins are drawn
from the bag at random, then find the odds in favour of the draw yielding the maximum possible
amount.
a.1:968
b.968:969
c.1:969
d.969:968

Is this solution Helpfull? Yes (13) | No   

Mainak Modak  (10 years ago)

a)1/968 as odds in favour=(5c4/20c4)/(1-(5c4/20c4))

Is this solution Helpfull? Yes (10) | No (1)  

saurav roy  (10 years ago)

8c4/4*4*4*4............

Is this solution Helpfull? Yes | No (5)  

Surbhi Samariya  (10 years ago)

B) 1:969
Because
1-(8/20*7/19*6/18*5/17)

Is this solution Helpfull? Yes | No (4)  

NILESH GHOSH  (10 years ago)

plz elaborate in detail

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Rahul Kumar Sinha  (10 years ago)

1-(5C4/20C4) = 1- 1/969 = 968/969 so option b

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kiran bora  (10 years ago)

max amount is 4 8rs. coins so
8c4/20c4 = 14/969
odds in favour= num/(denom-num) = 14/(969-14) = 14/955
answr is not given...

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saurav roy  (10 years ago)

ans is 14/955......dummy question

Is this solution Helpfull? Yes | No (3)  

saipraveen  (10 years ago)

here he mentioned clearly ,if 4 coins are dwn frm bag,
sototal coins are 20 and mentioned if 4 coins are drwn den we can write it as 20c4 =n(s)
more over he asked maximum possible amount means its possible with five 5rs coins only(i.e 5c4) but doesnt satisfis with 8rs cions,2rs coins
==>so finaly we can write it as 5c4/20c4-1/968

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