alleryपहिल्या 10 नैसर्गिक संख्यांची सरासरी आहे:
A5.5
B5
C6
D6.5
Answer & Solution
Correct answer: A. 5.5
1. पहिल्या 10 नैसर्गिक संख्या 1 ते 10 या आहेत.
2. त्यांची बेरीज 10 x 11 / 2 = 55 आहे.
3. सरासरी म्हणजे बेरीज भागिले एकूण संख्या, म्हणजेच 55 / 10.
4. यामुळे 5.5 मिळते.
5. 5 हे उत्तर 1 ते 10 मधील मध्य निष्काळजीपणे घेतल्याने येईल; सम संख्या असल्यास मध्य 5 आणि 6 च्या दरम्यान येतो.
_Source: syllabus Maths, Ch 13 'Statistics', S13.2 Mean of Grouped Data_
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