In both panels, the broad Gaussian (solid line) represents the color distribution of the entire GCS. The two narrower Gaussians represent the assumed bimodality of old metal-poor and metal-rich clusters. The dashed line results from subtracting the bimodal color distribution. In the left panel (case 1), intermediate-age clusters dominate, in the right panel (case 2), old clusters dominate. Case 2 is less consistent with the properties of the GC population.