Answer: 0.1064
Step-by-step explanation:
D= Both Alzheimer's are less than 80years old.
E= Two of 3 people who have Alzheimer's.
P(D | E ) = P ( D ∩ E)
P ( E )
= P ( A ∩ B ∩ C )
P ( A ∩ B ∩ C ) + P ( A ∩ B ∩ C ) + P ( A ∩ B ∩ C )
= Pa * Pb * (1 - Pc ) Pa * Pb * (1 - Pc ) + (1 - Pa ) * Pb * Pc + Pa * (1 - Pb ) * Pc
= 0.0017
=0.0010+0.0017+0.0037
=0.1064
