The A.M. of n observations is M. If the sum of n–4 observations is a, then the mean of…
Mathematics · JEE Main · NTA Exams — Statistics and Probability
The A.M. of n observations is M. If the sum of n–4 observations is a, then the mean of remaining 4 observations is
- \(\frac{\mathrm{nM}-\mathrm{a}}{4}\)
- \(\frac{\mathrm{nM}+\mathrm{a}}{2}\)
- \(\frac{\mathrm{nM}-\mathrm{A}}{2}\)
- nM + a
Answer
(A) nM - a 4
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