Question

a cookie is randomly drawn from a box with 4 small cookies, 13 medium cookies, and 8 large cookies. event a: medium event b: large p(a or b) =? hint: p(a or b) = p(a) + p(b) round your answer to the nearest hundredth

Explanation:

Step1: Calculate total number of cookies

$4 + 13+8=25$

Step2: Calculate $P(A)$

$P(A)=\frac{13}{25}$

Step3: Calculate $P(B)$

$P(B)=\frac{8}{25}$

Step4: Calculate $P(A\ or\ B)$

Since $A$ and $B$ are mutually - exclusive events, $P(A\ or\ B)=P(A)+P(B)=\frac{13 + 8}{25}=\frac{21}{25}=0.84$

Answer:

$0.84$