Question

a ball is randomly drawn from a box with 3 footballs, 9 baseballs, and 8 golf balls. event a: baseball event b: golf ball p(a or b) = ? hint: p(a or b) = p(a) + p(b)

Explanation:

Step1: Calculate total number of balls

$3 + 9+8=20$

Step2: Calculate P(A)

$P(A)=\frac{9}{20}$

Step3: Calculate P(B)

$P(B)=\frac{8}{20}$

Step4: Calculate P(A or B)

$P(A\ or\ B)=P(A)+P(B)=\frac{9}{20}+\frac{8}{20}=\frac{9 + 8}{20}=\frac{17}{20}=0.85$

Answer:

$0.85$