A single discount % equal to three successive discounts of 30%, 20% and 10%.
Let the initial price be 100.
30% discount on 100 is 30
(100 - 30) = 70
20% discount on the 70 is 14
(70 - 14) = 56
10%discount on the 56 is 5.6
So the answer is 30 + 14 + 5.6 = 49.6
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