Step 1: Substitute the values of \( A \) and \( B \) into the Boolean expression.
The Boolean expression is:
\[
Y = AB + BA'
\]
Substituting the values \( A = 1 \) and \( B = 1 \):
\[
Y = (1 \times 1) + (1 \times 0) = 1 + 0 = 1
\]
Final Answer:
The value of \( Y \) is \( \boxed{1} \).