The mean of 50 observations was 36. It was found later that an observation 48 was worngly taken as 23. The correct new mean is :
The mean of 50 observations was 36. It was found later that an observation 48 was worngly taken as 23. The correct new mean is : Correct Answer 36.5
"50টি পর্যবেক্ষণের গড় মান 36 ∴ 50 ,, ,, ,, মোট ,, 36 × 50 = 180O আবার, 48 এর স্থলে নেয়া হয়েছে 23 ∴ কম নেওয়া হয়েছে 48 – 23 = 25 ∴ সঠিক মোট মান 1800 + 25 = 1825 ∴ সঠিক গড় মান = 182550 = 36.5"