किसी कक्षा में 9 छात्र और कुछ छात्राएं हैं। किसी परीक्षा में छात्रों के प्राप्तांकों का औस
| 12 है और छात्राओं के प्राप्तांकों का औसत 14 है। यदि सभी छात्रों के कुल प्राप्तांकों का
औसत 13.1 हो तो कक्षा में कुल छात्रों की संख्या क्या थी?
In a class, there were 9 boys and some girls. In a test the mean score obtained by the boys
was 12 while that obtained by the girls was 14. If the overall average was 13.1, what was
the total number of students in the class?
Answers
Answered by
0
Step-by-step explanation:
it should be 540+14x = 131
Answered by
2
Answer:
20
Step-by-step explanation:
- 9*12+ X*14 = 13.1
X+9
2. X = 11
3. Total student = 9+11 = 20
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