Mathematics · JEE | STATISTICS

Based on the grouped frequency distribution table for marks obtained (Class intervals: 10-25, 25-40, 40-55, 55-70, 70-85, 85-100 with respective frequencies 2, 3, 7, 6, 6, 6), what is the class mark for the third class interval (40 - 55)?

1. A
   47.5
2. B
   32.5
3. C
   62.5
4. D
   55.0