In a wholesale centre, ⁸₁₁ of the customers were female. There were 65 more female customers. Within five minutes, some female customers left the wholesale centre. As a result, there were ³₅ as many male customers as female customers. How many female customers left the wholesale centre during the five minutes?
Number of female customers = 8 u
Total number of customers = 11 u

Number of male customers
= 11 u - 8 u
= 3 u

8 u - 3 u = 65
5 u = 65

1 u = 65 ÷ 5 = 13

Number of female customers at first
= 8 u
= 8 x 13
= 104

Number of male customers
= 3 u
= 3 x 13
= 39

The number of male customers remains unchanged.
3 p = 39

1 p = 39 ÷ 3 = 13

New number of female customers
= 5 p
= 5 x 13
= 65

Number of female customers who left
= 104 - 65
= 39

Answer(s): 39