PSLE The table shows the number of students with the following scores. A higher score means a better performance. Prizes were given to the top 12 students. Zeph won a prize. What was the lowest he could have scored?
Score |
10 |
12 |
15 |
18 |
21 |
23 |
25 |
Students |
1 |
2 |
8 |
11 |
7 |
4 |
1 |
Score |
10 |
12 |
15 |
18 |
21 |
23 |
25 |
|
|
|
|
|
Winners |
Students |
1 |
2 |
8 |
11 |
7 |
4 |
1 |
If the winning score is 25, number of winners = 1
If the winning score is 23, number of winners = 1 + 4 = 5
If the winning score is 21, number of winners = 1 + 4 + 7 = 12
Since there are 12 winners, the lowest score that Zeph could have scored = 21
Answer(s): 21