Let the annual instalment be Rs. P.
Amount of ? 100 after 4 yr = 100 + (100 x 5 x 4)/100 = ? 120
? Present Value (PV) of ? 120 due after 4 yr = ? 100
Present Value (PV) of ? due after 4 yr = 100P/120 = 5P/6
Similary, PV of ? P due after 3 yr = 20P/23
PV of ? P due after 2 yr = 10P/11
PV of ? P due after 1 yr = 20P/21
? 5P/6 + 20P/23 + 10P/11 + 20P/11 = 6450
? P = ? 1810
U ? A = {a, b, c, d, e, f} ? {a, b, c} = {a, b, c, d, e, f} = U
(U ? A)? = ?.
Sunil's income is less than Mukul's = [(10 / (100 + 10)] × 100 %
= ( 1000 / 110 )%
= 9.09 %
So, 39 is wrong.
So, 33 is wrong. It must be 35
∴ x = 7.
So, 40 is wrong.
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