railway RRB Group D Mock Test Series 2024-25 Quantitative Aptitude Elementary Statistics

यदि x + 2, x + 5, x + 6, x + 8, x + 9, x + 12 का माध्य 18 है, तो प्रेक्षणों की माध्यिका ज्ञात कीजिए।

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