Question: 3. How many eleven-digit whole numbers are there which include: (5 marks) a) two 7's, four 6s, and five 5's? b) four 2's, five 4's,

3. How many eleven-digit whole numbers are there which include: (5 marks) a) two 7's, four 6s, and five 5's? b) four 2's, five 4's, and two O's (zero)

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