• Got a question on how to use our new website? Check out our user guide here!

URGENT! Need help with probability question (1 Viewer)

Danneo

Member
Joined
Sep 12, 2016
Messages
43
Gender
Male
HSC
2018
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

Well-Known Member
Joined
Dec 11, 2014
Messages
6,091
Gender
Male
HSC
N/A
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)








–––––––––



 
Last edited:

Danneo

Member
Joined
Sep 12, 2016
Messages
43
Gender
Male
HSC
2018
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
 

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

Top