In a mega store, ⁷₁₁ of the customers were male. There were 72 more male customers. Within five minutes, some male customers left the mega store. As a result, there were ³₄ as many female customers as male customers. How many male customers left the mega store during the five minutes?
Number of male customers = 7 u
Total number of customers = 11 u

Number of female customers
= 11 u - 7 u
= 4 u

7 u - 4 u = 72
3 u = 72

1 u = 72 ÷ 3 = 24

Number of male customers at first
= 7 u
= 7 x 24
= 168

Number of female customers
= 4 u
= 4 x 24
= 96

The number of female customers remains unchanged.
3 p = 96

1 p = 96 ÷ 3 = 32

New number of male customers
= 4 p
= 4 x 32
= 128

Number of male customers who left
= 168 - 128
= 40

Answer(s): 40