Answer:
There is a [tex]\frac{2}{3}[/tex] chance that it will be a boy.
Step-by-step explanation:
The total number of babysitters is six.
Four are boys, and two are girls. This means that there is a [tex]\frac{4}{6}[/tex] chance of the babysitter being a boy and a [tex]\frac{2}{6}[/tex] chance of the babysitter being a girl.
It becomes [tex]\frac{2}{3}[/tex] after being simplified ([tex]\frac{4}{6}[/tex] has a common factor of 2).