if the sample is 
150 1 
150 1 
160 1 
140 1 
140 1

is the answer 5?

No. Read description carefully.

\"No. Read description carefully.\"

What\'s the meaning of \"No\"?...
it stands for \"No response\" or \"Wrong Answer\"....

Wrong Answer

150 1 
150 1 
160 1 
140 1 
140 1
the answer is???

2

I know
\"was already been arranged in a line\"