or
The employee at the department store counted the number of ties on each tie rack.

1-10
11-20
21-30
31-40
41-50
51-60
61-70
0
1
2
3
4
5
6
Number of racks
Number of ties
Ties per rack


How many racks have between 41 and 50 ties?

racks
ref_doc_title.

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