Her friend bought the same T - shirt for $ 17.5 after 30 % discount.
We are given that a girl bought a T- shirt for $ 25.
Selling price = $ 25
Now, her friend bought the same T- shirt for 30 % off.
Discount rate = 30 %
Let the discounted price at which her friend bought the t - shirt be x.
So, we get that:
x = $ 25 - 30 % of $ 25
x = $ 25 - 30 / 100 × 25
x = $ 25 - $ 7.5
x = $ 17.5
Therefore, her friend bought the same T - shirt for $ 17.5 after 30 % discount.
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