your answer Mr.Soroban very logic
Originally Posted by Soroban
my answer was correct but it is mising the permutition of two student and how are the student that choosen from the group ,
is describtion correct ???
Thank you so much for every one....
sorry ,i have another problem
the problem is
If P (A1) = 5 P (A2) , AC S.
P(A/A1)= 0.2 ,P(A/A2) = 0.3
what is the value of P (A1 /A) ?
i am trying to solve it but i can not find the relation between the rules...
From the rules
0.3= P(A ∩A2)/P(A2)
0.2= P(A ∩A1)/P(A1)
= P(A ∩A1)/ 5 P(A2)