Question: 4. The following represents the sequence; 3, 4, 5, 6, 7, 8, 9 a) How many numbers must be selected if at least three

4. The following represents the sequence; 3, 4, 5, 6, 7, 8, 9 a) How many numbers must be selected if at least three of the selected numbers must add up to 18 b) How many numbers must be selected if at least two of the selected numbers must add up to more than 10
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