A four-year study of various brands of bottled water found that 25% of bottled water is just tap water packaged in a bottle. C

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A four-year study of various brands of bottled water found that 25% of bottled water is just tap water packaged in a bottle. C

onsider a sample of sevenseven bottled-water brands, and let x equal the number of these brands that use tap water. Complete parts a through d.
a. Is x (approximately) a binomial random variable?
b. Give the probability distribution for x as a formula.
c. Find p(x = 2).
d. Find P(x <= 1).

Mathematics