railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Standard Deviation

 यदि संख्याओं  9, 15, 1, 15, 14, 9, 4 और X की माध्यिका 11 है, X ज्ञात कीजिए।

1
12
2
11
3
10
4
13
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