A telephone number consists of 7 digits. How many phone numbers are possibe if the first...

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A telephone number consists of 7 digits. How many phone numbers are possibe if the first digit is neither 1 or 0? Answer Draw a tree diagram showing all sequences of head and tails that are possible in three tosses of a coin. Answer Perform the indicated computation: 12!/7! Answer The Oxford Place Bookstore give 4 different books, one to each of 4 students. In how many different ways can this be done? Answer A telephone number consists of 7 digits. How many phone numbers are possibe if the first digit is neither 1 or 0? Answer Draw a tree diagram showing all sequences of head and tails that are possible in three tosses of a coin. Answer Perform the indicated computation: 12!/7! Answer The Oxford Place Bookstore give 4 different books, one to each of 4 students. In how many different ways can this be done? Answer