Cluster samples and means 2

A one stage cluster sample in a population of 100 clusters of unequal size selected 10 clusters. The total number of ssu's in the 10 clusters was 45. The estimated total was tunb = 1, 912, 500. The mean is estimated to be Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a 4,250 b 42,500 C 19,125 d none of the above