155
It is 83.
The numbers are 81, 82, 83, 84 and 85.
82 + 83 + 84 + 85 = 334
It is 81.5, the number halfway between the two middle numbers.
The median is 86.
155
70, 72, 74, 75, 76, 77, 78, 80, 81, 82, 84, 85 (including 70 and 85)
83
It is 83.
78
67. It is the difference between the highest number: 99, and the lowest number: 32.
Mean = (85+82+84+77+82+88)/6 = 498/6 = 83
The composite numbers are: 72, 74, 75, 76, 77, 78, 80, 81, 82, 84, 85, 86 ,87, 88
62, 63, 64, 65, 66, 68, 69, 70, 72, 74, 75, 76, 77, 78, 80, 81, 82, 84, 85, 86, 87, 88.60, 62, 63, 64, 65, 66, 68, 69, 70, 72, 74, 75, 76, 77, 78, 80, 81, 82, 84, 85, 86, 87, 88, 90
85
The median is 85.