Answer:
B
Step-by-step explanation:
A rational number can be expressed in the form
[tex]\frac{a}{b}[/tex] ← where a and b are integers
From the set
3 is rational as it can be expressed as [tex]\frac{3}{1}[/tex]
and [tex]\sqrt{9}[/tex] = 3 ← rational
[tex]\sqrt{2}[/tex], [tex]\sqrt{3}[/tex] and [tex]\sqrt{7}[/tex] ← are irrational numbers
Thus there are 2 rational numbers out of the 5 given, thus
P( rational ) = [tex]\frac{2}{5}[/tex] → B
