P( he will not accept any ) = 1 - ( 2/90 )^3 = 0.999
did you forgot to write that that or? ( than it is ok )
Attempt for a and b are fine. However c is wrong!!! require help for part C
There are three cartons of vases, each containing 8 good vases and 2 defective ones. A buyer selects 2 vases at random from each carton to check. If both vases selected from a carton are good, he will accept the carton: otherwise, he will reject the carton. Find the probability that
(a) he will accept a carton.
(b) he will accept all three cartons.
(c) he will accept at least one carton.
Attempt
a) P(he will accept a carton)=
=
b)P(he will accept all three)=
=
c)P(at least 1 accepted)=
=
=