Answer:
75
Step-by-step explanation:
Line up the numbers in order from smallest to largest
70 72 77 80 81
We have an unknown number
The median is 76
The median is the middle number
We know it has to be smaller than 77
Put it as the 3rd number since the median is 76
70 72 x 77 80 81
since there is an even number of points the median is the average of the middle numbers
x+ 77 divided by 2 = 76
x+77 = 76*2
x+77 = 152
x = 152 - 77
x =75
