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STATISTICS — MATHS STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceMATHSSTATISTICS1 Mark
MCQ
Two high school classes took the same test. One class of 20 students made an average grade of 80%; the other class of 30 students made an average grade of 70%. The average grade for all students in both classes is:
  • A
    75%
  • ✓
    74%
  • C
    77%
  • D
    None of these
✓

Answer

Correct option: B.
74%
$ \text{Average}=\frac{20.80+30.70}{20+30}=74$

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