Select the combination of letters that when sequentially placed in the blanks of the given series will complete the series.
K O _ M C L _ Q M C M O _ M _ N O Q _ C
An online entrance exam was conducted in 250 centres all over a country. The average number of applicants per centre was found to be 1250. However, it was later realised that in one centre, the number of applicants was counted as 1758 instead of 1658. What was the correct average number of applicants per centre?