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Math Help - please help in selecting the events of probability

  1. #1
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    please help in selecting the events of probability

    I have the following probability assesment table
    no.of blemishes-0,1,2,3,4,5
    probability-0.34,0.25,0.19,0.11,0.07,0.04

    I was trying to select an event A i.e more than 2 blemishes and event B which is 4 or fewer blemishes.

    means P(A>=2) and P(B<=4) inorder to calculate P(A) & P(B)how should I approach?Do I need proceed thru binomial distribution?

    Thanks In advance
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  2. #2
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    The probability of more than 2 blemishes is just 0.11+0.07+0.04 and probability of 4 or fewer blemishes is 1 - 0.04 = 0.96.
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  3. #3
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    Thank you for the response. so then A intersection B should be 0.11+0.07 right?
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  4. #4
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    Quote Originally Posted by sgk1980 View Post
    Thank you for the response. so then A intersection B should be 0.11+0.07 right?
    Yes, since this is the event of 3 or 4 blemishes, just add those probabilities together
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  5. #5
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    Thanks a lot.One more query if event A has atleast 1 blemish and event B has atmost 3 blemishes then AUB = 0.55(0.25 + 0.11+0.19) right?
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  6. #6
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    Quote Originally Posted by sgk1980 View Post
    I have the following probability assesment table
    no.of blemishes-0,1,2,3,4,5
    probability-0.34,0.25,0.19,0.11,0.07,0.04

    I was trying to select an event A i.e more than 2 blemishes and event B which is 4 or fewer blemishes.

    means P(A>=2) and P(B<=4) inorder to calculate P(A) & P(B)how should I approach?Do I need proceed thru binomial distribution?
    No indeed.
    Just add up the corresponding probabilites from the given table.
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  7. #7
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    Thank you .then A complement should be .30 right?
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