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Math Help - Probability Questions

  1. #1
    @_@
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    Probability Questions

    I am not too sure did i do these questions correctly.

    A salesperson contacts eight potential customers per day. From past experience, we know that the probability of a potentail customer making a purchase is 0.10.

    a) What is the probability the salesperson will make at least two sales in a day?
    -Do you use binomial formula for this question, which is 1 - 0.4305 + 0.3826 = 0.1869 ?

    b) What percentage of days will the salesperson not make a sale?
    Would that be caculating P(0). Use the binomial formula again and get 43.05%?

    c) What is the expected number of sales per day?
    8* 0.1 = 0.8?

    would anybody please check my answers thanks.
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  2. #2
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    Hello, @_@!

    You did great!

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