Question

p(b)=3/13,n(s)=52,n(b)=?​

Answer 1

$\begin{gathered} \because \: P(B) = \frac{n(B)}{n(S)} \\ \\ \therefore \: \frac{3}{13} = \frac{n(B)}{52}\\ \\ \therefore \:n(B) = \frac{3 \times 52}{13} \\ \\ \therefore \:n(B) = 3 \times 4\\ \\ \huge \purple { \boxed{\therefore \:n(B) = 12}}\end{gathered}$