the mean is the average basically
(summ of all numbers) divided by (total number of numbers) exg
1,2,3
(1+2+3)/(3)=2
median is the number in the direct center when the numbers are aranged in decending or acending order exg
1,2,3
median=2
mode=most common number exg
1,2,3,4,4,4,5,6
mode=4
mean of 5 numbers
(x+y+z+t+a)/5
is the same as
=
the median
which is equal to the range which equals 4
therefor
median=4 and mean =4 so
(x+y+4+t+a)/5=4
multiply both sides by 5
x+y+4+t+a=20
subtract 4 from both sides
x+y+t+a=16
the most common number is 4
so we can assume that the smallest and largest are the same:4
the answer is D:4