The line graph shows the record of number of admissions to a certain coaching centre from 2011 to 2016. Study the diagram and answer the following question.
In how many years was the number of admissions greater than that of the previous year?
The weights of 4 boxes are 30, 20, 60 and 70 kilograms. Which of the following cannot be the total weight,in kilograms, of any combination of these boxes and in a combination a box can be used only once?