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# Probability Calculation

Posted on 2016-07-20
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Can you tell me if my calculations are right?  Thanks.

Three events occur with probabilities P(E1)=0.38​, P(E2)=0.14​, and P(E3)=0.51. If the event B​ occurs, the probability becomes P(E1|B)=0.26​, P(B)=0.33. Complete parts a through c.

a. Calculate P(E1 and B).  ==> 0.38 + 0.26

b. Compute P(E1 or B). 0.38 - 0.33

c. Assume that E1​, E2​, and E3 are independent events. Calculate P(E1 and E2 and E3). --> 0.38 + 0.14 + 0.51
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Question by:mustish1
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Accepted Solution

sdstuber earned 2000 total points
ID: 41722127
no, all 3 are wrong

for "and"  you multiply probabilities

for "or" you add probabilities
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Author Closing Comment

ID: 41722129
Thanks.
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