An article says, "Buy 5 T-shirts, get 4 free and an
additional 20% discount". Find the final discount.
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Step-by-step explanation:
Let cost of one T shirt be a
Cost of 5 tshirt=5a
Cost of free tshirts=4a
Total cost of tshirts=9a
Additional discount=20%9a
=9a/5
Final discount={(5a-9a/5)÷5a}×100%
={16a/25a}×100%
=64%
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