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Option 4 : From Bala
Arun purchases the television = Rs. 16000
Price of the colour television = Rs. 16000
A = 17776, t = 2 years and r = 5%
As we know,
A – P = Prt/100
⇒ 17776 – P = (P × 2 × 5) /100
⇒ 17776 – P = P/10
⇒ 177760 – 10P = P
⇒ 10P + P = 177760
⇒ 11P = 177760
⇒ P = 177760/11
⇒ P = 16160
Television cost for Bala = 16160
In this deals of Bala better for the shopkeeper.
Short Trick
Let the TV cost be 100%
Interest rate for 2 year = 2 × 5 = 10%
110% = 17776
⇒ 100% = (17776/110) × 100 = 16160
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