Solution
Step 1
Given data
The probability that he will sink any given shot P(x) = 0.78
n = 20
Step 2:
[tex]\begin{gathered} Expected\text{ number of shot = Probability }\times\text{ number of attempts} \\ Expexted\text{ number of shoots = 0.78 }\times\text{ 20 = 15.6 = 16} \end{gathered}[/tex]Final answer
16