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URGENT! Need help with probability question (1 Viewer)

Danneo

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Thank god if someone replies as HSC math is within a few hours

-If 3% of coins produced are faulty, what is the probability that a sample of 3 coins taken from the production line will have atleast two faulty coins

I keep getting the quesiton wrong

Ans = 1323/500000 (I think thats the right ans)
 

InteGrand

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Thank god if someone replies as HSC math is within a few hours

-If 3% of coins produced are faulty, what is the probability that a sample of 3 coins taken from the production line will have atleast two faulty coins

I keep getting the quesiton wrong

Ans = 1323/500000 (I think thats the right ans)








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Last edited:

Danneo

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Holy crap, this just changed how i see binomial, so just tested 1 - (P(No faults) + (1 fault))
P(No faults) = (97/100)^3
P(Exactly 1 fault) = 3C1*(3/100)*(97/100)^2
and it worked, thank you good sir
 

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