Are you a chocolate purist, or do you like other ingredients in your chocolate? American Demographics reports

Question:

Are you a chocolate "purist," or do you like other ingredients in your chocolate? American Demographics reports that almost 75% of consumers like traditional ingredients such as nuts or caramel in their chocolate. They are less enthusiastic about the taste of mint or coffee that provide more distinctive flavors. A random sample of 200 consumers is selected and the number who like nuts or caramel in their chocolate is recorded.
a. What is the approximate sampling for the sample proportion ? What are the mean and standard deviation for this What is the probability that the sample percentage is greater than 80%?
c. Within what limits would you expect the sample proportion to lie about 95% of the time?
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