Question 771190
(a) P(only one seed germinates)
=3{{{C[1](2/3)^1(1/3)^(3-1)}}}
=3{{{C[1](2/3)^1(1/3)^2}}}
={{{2/9}}}
(b) P(exactly two seeds germinate)
=3{{{C[2](2/3)^2(1/3)^(3-2)}}}
=3{{{C[2](2/3)^2(1/3)^1}}}
={{{4/9}}}