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The mean of 30 number is 18. what will be the new mean, if each observation is increased by 2j |
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Answer» Answer: Step-by-step explanation: The mean of 20 OBSERVATION is 25 ∴ SUM of 20 observations =20×25=500 ⇒ New sum of 20 observations after INCREASING each observation by 2 =(2×20)+500=40+500=540 ⇒ REQUIRED mean = 540/20 =27 |
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