Latest TCS Aptitude Question SOLUTION: 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 ma

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(#M40029968) TCS Logical Reasoning question Keep an EYE

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.
option
a. 1:968
b. 968:969
c. 1:969
d. 969:968

Asked In TCS Final year (10 years ago)

Unsolved Read Solution (8)

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Vijil Gupta  (10 years ago)

ANS: a.1:968
Probability of yielding maximum possible amount = 5C4/20C4=1/969
(since maximum amount is possible only when all 5 rs coins are selected)

odds in favour = numerator/(denominator-numerator)
= 1/(969-1)
= 1/968

Is this solution Helpfull? Yes (49) | No (1)  

Ashish  (10 years ago)

5C4/20C4=1/969

5C4 because maxi possible amount and it possible only when all 5 rs coin will be selected.

20c4 because total 20 coin and we have to select only 4 coin

Is this solution Helpfull? Yes (1) | No (3)  

saurav roy  (10 years ago)

to draw max u hv to choose 4 five rupee...(5c4)(favourable outcome)....total outcome=20c4..the reqd probability is 5c4/20c4...thank u

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babli  (10 years ago)

5C4 / 20C4 = 1:969

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TUSHAR BHARGAVA  (10 years ago)

5C4/(20C4-5)
5/4840
1/968

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ASHISH MISHRA  (10 years ago)

a.............

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shaik babidha  (10 years ago)

the ansr is optn a..
the total no. of coins=20 so 4 randomly droppd so the combinatin of coins are 5c4..
from the total no. of coins 20c4
i.e 5c4/20c4=[(5*4*3*2)/(1*2*3*4)]/[(20*19*18*17)/(1*2*3*4)] so
5/4840....then the ansr is 1/968

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omsriharisha  (9 years ago)

ANS:a
total number of combinations are :20
we select four coins in these 24 so :20c4
we select odd number and maximum amount so we select 5 rupee coins because odd conditions are 5 and 1 rupee coins but we select maximum amount so we select 5 rupee coins so 5c4
maximum possible amount is =>5c4/20c4

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