The number of black bags there given the ratio black to blue as 5 to 3 is 25
Black : Blue = 5 : 3
Total blue : Total black = x : 15
Equate the ratio
5 : 3 = x : 15
5/3 = x / 15
5 × 15 = 3 × x
75 = 3x
x = 75/3
x = 25 black bags
Therefore, the number of black bags there given the ratio black to blue as 5 to 3 is 25
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