Given - Goku and Vegeta are waiting in a line
To find - are there more than 10 people waiting in the line lets check conditions.
Assuming Goku = G, Vegeta = V ,and Piccolo = P
1st - Counting from beginning of the line, Goku is 5th person, and counting from the end of the line, Vegeta is the 5th person.
Lets assume if there are 5 persons in the line So line will look like this - V(1st/5th from last) _ _ _ _ G(5th from start)
Similarly for for 6 - _ V(2nd/5th from last) _ _ _ G(5th from start) _
Similary it will change for number of people 7, 8, not 9, 10, 11, 12.. and so on. Not sufficient.
Why not 9 because it will place both goku and vegeta on same place and that is not possible.
2nd - Picollo is standing between Goku and vegeta.
"_ G P V _" or "_ V P G _ " with these as well multiple cases are possible. Not sufficient
Now lets combine both.
i - For "_ V P G _" with n= 7
" _ _ V(5th from end) P G(5th from start) _ _ " - This case is possible
ii - For "_ G P V _" with n = 11
" _ _ _ _ G(5th from start) P V(5th from end) _ _ _ _ " This case is possible
So we are not sure about are there more than 10 people waiting in the line.
Answer E.