The table below shows the range of marks scored by a group of 220 students in a competition.

Marks	Number of students
70	24
75	44
80	108
85	36
90	8

20% of the students in this group qualified for the next round. What is the minimum score needed to qualify for the next round?

1. Calculate the number of students who qualified for the next round.

Number of students who qualified = $20\% \times 220 = \frac{20}{100} \times 220 = 44$

2. Determine the minimum score by counting the top 44 students from the highest marks downwards.

Students scoring 90 marks: $8$
Students scoring 85 marks: $36$
Total students scoring 85 or 90 marks = $8 + 36 = 44$
Since exactly 44 students scored 85 or above, the minimum score needed to qualify is 85.