Question

section 5.2 homework
score: 1/15 answered: 1/15
question 2
find the indicated probability
given
p(a)=0.4
p(b)=0.4
p(a and b)=0.25
p(a or b)=

Explanation:

Step1: Recall the formula for $P(A\ or\ B)$

$P(A\ or\ B)=P(A)+P(B)-P(A\ and\ B)$

Step2: Substitute the given values

$P(A) = 0.4$, $P(B)=0.4$, $P(A\ and\ B)=0.25$
$P(A\ or\ B)=0.4 + 0.4- 0.25$

Step3: Calculate the result

$P(A\ or\ B)=0.55$

Answer:

$0.55$