Question-45
Mean
Let the mean of a set of seven numbers be \(36\). If the mean of the first six numbers is \(30\), what is the seventh number\(?\)
Hint
\(\overline{x} = \dfrac{\sum_{i=1}^{n}x_i}{n}\)
Answer
72
Solution
Let the mean of a set of seven numbers be \(36\). If the mean of the first six numbers is \(30\), what is the seventh number\(?\)
\(\overline{x} = \dfrac{\sum_{i=1}^{n}x_i}{n}\)
72