PDF chapter test TRY NOW
1. The mean of \(5\), \(9\), \(x\), \(17\) and \(21\) is \(13\), then find the value of \(x\).
2. The mean of the square of first \(11\) natural numbers is .
3. The mean of a set of numbers is \(\overline X\). If each number is multiplied by \(z\), the mean is
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