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Katen [24]
3 years ago
8

P (a) =0.60, p(b) = 0.25, and p(a and b) =0.15 what is p(a or b) ?

Mathematics
2 answers:
choli [55]3 years ago
7 0

Answer:

C is the correct option

Step-by-step explanation:

To find the probability of P(a or b) we will use  the formula:

P(a or b)= P(a)+ P(b) - P(a-b)

Now put the given values in the formula:

P(a or b)= 0.60+0.25-0.15

P(a or b)=0.85 - 0.15

P(a or b)= 0.70

Thus the correct option is C....

Serggg [28]3 years ago
6 0

Answer: Option C

P (A\ or\ B) = 0.70

Step-by-step explanation:

If A and B are events that are not mutually exciting, then it is true that:

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

In this case we know P(A), P(B) and we also know P (A\ and\ B)

P(A)=0.60

P(B) = 0.25

P(A\ and\ B)=0.15

Therefore we have that:

P (A\ or\ B) = 0.60 + 0.25 - 0.15

P (A\ or\ B) = 0.60 + 0.1

P (A\ or\ B) = 0.70

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