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9 प्रेक्षण का औसत 16 है । एक प्रेशक और सम्मीलित होने के कारण नया औसत 17 हो जाता है । 10 वा प्रेक्षण ज्ञात करे ?A. 9B. 16C. 26D. 30 |
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Answer» Correct Answer - C According to the question mean of 9 observation is =16 sum of all observation is =16x9=144 when one more observation included the new mean =17 Sum of 10 observations =10x17=170 `therefore ` `10^(th)` observation =170-144=26 |
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