
Respuesta :
Answer:
0.019 Â or 1.9%
Step-by-step explanation:
Let U = Union member
   N= Non union member
Let the probability of U ; P(U)= 0.94
P(N) = 0.06
Sample size = 4
Outcomes  = 2 i.e  either Union or Non-Union
Total possible outcomes= 4²
                    =  16
Total Possible outcomes is shown below
1st member  2nd member   3rd member   4th member   Â
   U            U            U             U
   U            U            U             N
   U            U            N             U
   U            U            N             N
   U            N            U             U
   U            N            U             N
   U            N            N             U
   U            N            N             N
   N            U            U             U
   N            U            U             N
   N            U            N             U
   N            U            N             N
   N            N            U             U
   N            N            U             N
   N            N            N             U
   N            N            N             N
P( exactly two (2) workers are union members )
= P(UUNN) + P Â (UNUN) + P Â (UNNU) + P Â (NUUN) + P Â (NUNU) Â + P Â (NNUU)
= 6 x P(UUNN)
= 6 x (0.94 x0.94 x0.06 x0.06)
= 0.01908576
≈  0.019  or 1.9%