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phani reddy Grade: 12
        

four tickets 00.01,10,11 respectively are placed ina bag . aticket is drawn at random five times being replaced each time the probability that the sum on the tickets is 22 is

7 years ago

Answers : (1)

AKASH GOYAL AskiitiansExpert-IITD
419 Points
										

Dear Phani


There are 3 cases to get sum 22


1) 11+11+00+00+00


It can be done with prob of (5!/(3!*2!))*(1/4)^5


2)10+01+10+01+00


It can be done with prob of (5!/(2!*2!*1!))*(1/4)^5


3)11+10 +01+00+00


It can be done with prob of (5!/(2!*1!*1!*1!))*(1/4)^5


So total probability is sum of three which is 25/256


 


All the best

AKASH GOYAL
AskiitiansExpert-IITD

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7 years ago
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