It is unchanged because the same number would still be in the middle and there would still be the same amount of numbers
if
11,15,21,22,23,27,30 before 22 is the median
if
11,15,21,22,23,27,30 after 22 is still the median
The median is unchanged
1 ft = 0.333 yards
6 ft = ? yards
Sandra's scarf is: 6*0.333 yards = 2 yards
The total is equal to 57+24+41 = 122
Tea's probability 57/122=.47or 47%
Coffee's probability is 41/122 = .34 or 34%
Hopes this helps.
We can factorize the quadratic as

and expand the right side to get


Then we find
