math

Terese manages a grocery store warehouse that encourages volume shopping on the part of customers. Therese has discovered that on any given weekday, 70% of the customers' sales amount to more than $100. that is, any given sale on such a day has a probability of 0.70 of being for more than $100.
a) the first sales on Wednesday are both for more than $100.
b) None of the first three sales on Wednesday is for more than $100.

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  1. a).7 x .7=0.49
    b).3 x .3 x .3=0.027

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