Answer:
84 is the median
Step-by-step explanation:
100, 100, 92, 90, 88, 84, 81, 80, 80, 75, 40
\ 100, 92, 90, 88, 84, 81, 80, 80, 75 /
\ 92, 90, 88, 84, 81, 80, 80 /
\ 90, 88, 84, 81, 80 /
\ 88, 84, 81 /
\ __ /
84
31.8%
Step-by-step explanation:There are 7 months that have 31 days so,
The odds the first selected month has 31 days is 7/12
The next month there are only 6 months left with 31 days of only 11 months to choose from
so the odds for the second are 6/11
To calculate the odds they BOTH have 31 months you multiply the two odds:
(7/12) x (6/11) = 42/132 = .318 so 31.8%
3 1/2
