Hey!
Grape over total: [tex] \frac{4}{12} [/tex]
After he drinks 1, there will be 1 less. That means it will be over 11
Orange over total: [tex] \frac{5}{11} [/tex]
Now multiply the fractions
[tex] \frac{4}{12} \times \frac{5}{11} = \frac{20}{132} \rightarrow \frac{10}{66} \rightarrow \frac{5}{33} [/tex]
That means the probability is: [tex] \frac{5}{33} [/tex]
Good luck and hope this helps! :)
