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The median is the middle of the list (when sorted). In this case 16. The sorted list is:1, 4, 9, 16, 25, 36, 49.
7 and 9 are in the middle so you add 7 plus 9 to get 16 then divide by two so 16 ÷ 2 is 8 therefore the median is 8
The middle of 31 and 16 is (31 + 16)/2 = 23.5.
First put the numbers in order from smallest to largest. 2 4 4 9 16 Now not the middle number is 4 so that is the median.
9 over 16 is the same as 9 divided by 16: 9 ÷ 16 = 0.5625