PSLE
Students participating in a talent show must obtain at least a certain score in the first round to qualify for the next round. There were 90 students in the first round and the table shows the number of students for each score. 70% of the students did not qualify for the next round. From the table, what was the lowest score of a student who qualified for the next round?

Score	Number of students
0	11
5	25
10	27
15	20
20	6
25 or more	1

Score	Number of students	Status
0	11	70% of students did not qualify
5	25
10	27
15	20	30% of students qualified
20	6
25 or more	1

Percent of who qualified for the next round
= 100% - 70%
= 30%

Number of students who qualified for the next round
= 30% of students
= ³⁰₁₀₀ x 90 
= 27 

Number of students who score 25 or more = 1
Number of students who score 20 or more = 1 + 6 = 7
Number of students who score 15 or more = 1 + 6 + 20 = 27

Lowest score of a student who qualified for the next round = 15

Answer(s): 15