For the following distribution:
Class |
0 - 5 |
5 - 10 |
10 - 15 |
15 - 20 |
20 - 25 |
Frequency |
10 |
15 |
12 |
20 |
9 |
the upper limit of the modal class is
(a) 10 (b) 15 (c) 20 (d) 25
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