1. Multiple choice questions I

1. Let \(m\) be the midpoint and \(b\) be the upper limit of a class in a continuous frequency distribution. The lower limit of the class is 2m + bm - b2m - bm - 2b.

 

2. The mean of a set of seven numbers is \(81\). If one of the numbers is discarded, the mean of the remaining numbers is \(78\). The value of discarded number is 1019998100.

 

3. The algebraic sum of the deviations of a set of \(n\) values from their mean is n + 1n - 10n