Question

section 5.2 homework
score: 1/15 answered: 1/15
question 2
find the indicated probability
given
p(a)=0.55
p(b)=0.55
p(a and b)=0.3
p(a or b)=

Explanation:

Step1: Recall the formula

The formula for $P(A\ or\ B)$ is $P(A\ or\ B)=P(A)+P(B)-P(A\ and\ B)$.

Step2: Substitute the given values

Substitute $P(A) = 0.55$, $P(B)=0.55$ and $P(A\ and\ B)=0.3$ into the formula. So $P(A\ or\ B)=0.55 + 0.55- 0.3$.

Step3: Calculate the result

$0.55+0.55 - 0.3=0.8$.

Answer:

$0.8$