Resulting 83473

Mobile became cheaper by 30%, twice by 20%, and then by 10%. The resulting price is CZK 11,088. What was the original price?

Correct answer:

a =  10000 Kc

Step-by-step explanation:

b=11088 Kc r1=100%30%=110030=0.7 r2=100%+20%=1+10020=1.2 r3=100%+10%=1+10010=1.1  r=r1 r2 r2 r3=0.7 1.2 1.2 1.1=625693=1.1088  a r=b  a=b/r=11088/1.1088=10000 Kc

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