Question
Download Solution PDF15 परिणामांची सरासरी 52 आहे. जर पहिल्या 8 परिणामांची सरासरी 56 असेल आणि शेवटच्या 8 परिणामांची सरासरी 55 असेल, तर 8 व्या परिणामाचे मूल्य किती?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFदिलेल्याप्रमाणे:
15 परिणामांची सरासरी = 52
पहिल्या 8 परिणामांची सरासरी = 56
शेवटच्या 8 परिणामांची सरासरी = 55
वापरलेले सूत्र:
N संख्यांची बेरीज = N संख्याची सरासरी × N
गणना:
15 परिणामांची बेरीज = 52 × 15 = 780
पहिल्या 8 परिणामांची बेरीज = 56 × 8 = 448
शेवटच्या 8 परिणामांची बेरीज = 55 × 8 = 440
8 व्या परिणामाचे मूल्य = (पहिल्या 8 परिणामांची बेरीज + शेवटच्या 8 परिणामांची बेरीज) - 15 परिणामांची बेरीज
⇒ (448 + 440) - 780
⇒ 888 - 780 = 108
∴ 108 हे योग्य उत्तर आहे.
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