1. If x1, x2, x3,….., xn are the observations of a given data. Then the mean of the observations will be:Correct Answer

Sum of observations/Total number of observations Total number of observations/Sum of observations Sum of observations +Total number of observations None of the above

2. If the mean of frequency distribution is 7.5 and ∑fi xi = 120 + 3k, ∑fi = 30, then k is equal to:Correct Answer