# How to answer these questions ?

##### 1 Answer

#### Explanation:

The mean is the sum of the elements in the data set, divided by the size of the data set.

#bar(x)=(3+2n+1+4n+14+17+19)/6=q#

#rArrbar(x)=(6n+54)/6=q#

#rArrn+9=q" " to" " (color(red)(1))#

The median is the middle value of the data set, when it's arranged in ascending order. (If there is no middle value, the median is the average of the two middle values.)

#rArrstackrel~x =(4n+14)/2=13#

#rArr4n=12rArrn=3#

Substituting in

#rArrq=3+9=12#