Rework problem 17 from section 1.4 of your text,involving a product code. Assume that product codes are formed fromthe letters W, V, and R, and consist of 4 not necessarily distinctletters arranged one after the other. For example, WWVV is aproduct code.
(1) How many different product codes arethere?Â
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(2) How many different product codes do not containW?Â
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(3) How many different product codes contain exactlyone V?Â