The mean average is (9 + 15 + 4 + 8) ÷ 4 = 9;
The median average is (8 + 9) ÷ 2 = 8.5
The mode average doesn't exist as each number appears once.
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Average = (8 + 9 + 5 + 6)/4 = 7Average = (8 + 9 + 5 + 6)/4 = 7Average = (8 + 9 + 5 + 6)/4 = 7Average = (8 + 9 + 5 + 6)/4 = 7
4/9 = 20/45 8/15 = 24/45
the mean is the average; (9 +8+4 + X)/4 = 8; solve for X ; (21 +X)/4 = 8; X = 11
The mean of 8, 9, 11, and 16 is 8+9+11+16 = 44 and 44/4 = 11 which is the mean average
7 + 8 + 10 + 11 = 36 / 4 = 9