1 Answer

Dzim · Answer 1 · 2023-08-10T18:47:59+0000

P(A n B) is given by;

p( A n B) = p(A) x p(B)

From the question

p(A) = 9/20 and p(A n B) = 9/80

substitute the values into the formula and then solve for B

$(9)/(80)=\frac{9}{20\text{ }}* p(B)$

Multiply both-side of the equation by 20/9 so that 9/20 on the right-hand side of the equation can cancel-out

$(9)/(80)*(20)/(9)=\text{ p(B)}$
$(20)/(80)=\text{ p(B)}$
p(B)=(1)/(4)

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