Quartiles Q1 if L25 775 7th is 166 and 8th is 166 So Q1 w

Solution

If there are 25 entries , 13th entry is the median

For the left of median there will be 12 entries

Hence middle entries will be 6th and 7th

Q1 = median of the 12 entries = average of 6th and 7th

hence cannot be 166.

Only if 6th entry is known we canfind it out.