Latest TCS Aptitude Question SOLUTION: A bag contains six 10-rupee coins, four 5-rupee coins and two 1-rupee coins. Six coins are drawn without replacement with each coin equally likely to be chosen. What is the probabi

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(#M40012125) TCS question Keep an EYE

A bag contains six 10-rupee coins, four 5-rupee coins and two 1-rupee coins. Six coins are drawn without replacement with each coin equally likely to be chosen. What is the probability that the coins add up to a value of at least 48 rupees?
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• 59/924
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• 127/924
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• 194/924
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• 91/924
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• 37/924

Asked In TCS vaibhav sharma (11 years ago)

Unsolved Read Solution (3)

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Read Solution (3) :

Manish tiwari  (11 years ago)

127/924
given 6 coins of 10 Rs.
4 coins of 5 Rs. & 2 coins of 1 rs.
Since we have to select only 6 coins of any kinds to fullfill the condition we can select 6 coins as follows
6C6 for 60,6C5AND4C1 for 55,6C5AND2C1 for 51,6C4AND4C2 for 50
so total possible events are 6c6+6c5*4c1+6c5*2c1+6c4*4c2=127
total eway of selecting 6 coins are (6+4+2)C6=924
hence probability is =possible way/total way=127/924
)

Is this solution Helpfull? Yes (46) | No (9)  

D Chandra Shekar  (11 years ago)

Denomination: 10 5 1

possibilities: 6=>6C6 0 0 =>1
5=>6C5 1=>4C1 0 =>24
4=>6C4 0 1=>2C1 =>12
4=>6C4 2=>4C2 0 =>90
SUM : ======>127

Is this solution Helpfull? Yes (2) | No   

surajit  (11 years ago)

127/924.......

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