123
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(78 + 56)/2 = 67
The average is 56.
56 plus 67 equals 123. This addition can be solved by adding the ones column (6 + 7 = 13) and carrying over the tens place value to get the final result. In mathematical terms, this is expressed as 56 + 67 = 123.
67
The median of two numbers is also their mean = (78+56)/2 = 67