Question 354059
Let departmental stores sell x numbers
market stalls sell = 2x
foot salesman sells 2x/6
...
Total sold = 600
x+2x+x/3 =600
10x/3 =600
10x=1800
x= 180 sold at departmental stores
market stalls = 2x = 360
foot salesman = x/3 =60
..
180+360+60= 600
...
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