Table 4: Percentage of Cephei stars among the number of B stars in the same spectral range for different open clusters.

Cluster	% Cep
NGC 884	12-14%
NGC 869	5-7%
NGC 663	9-12%
NGC 3293	25%
NGC 4755	25-30%
NGC 6231	10-15%
NGC 2362	0%

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