Question 1099121
1.{{{P(D,D)= (4/25)(3/24)=1/50}}}
2.{{{P=P(D,N)+P(N,D)= (4/25)(21/24)+(21/25)(4/24) =7/25}}}
3.{{{P(N,N)= (21/25)(20/24) =7/10}}}