580550
90 Paisa in 1 year earn (100 – 90) or 10 paisa
100 Paisa in 1 year earn = $\frac{10×100}{90}$= 11.11 paisa
Minimum rate = 11.11%
For real return of 5%,
Expected return = (1 1.11 + 5)% = 16.11%
Redemption value = 500000 + 500000 x 16.11% = 580550
TK 40
Selling price of pen by 20% profit = Tk. (100 + 20) = Tk. 120
if buying price is Tk. 100 then selling price is Tk. 120
lfbuying price is Tk. 360 then selling price is Tk. $\frac{120×360}{100}$= Tk. 432
Afier 10% discount or quoted, the price will be = Tk. (100 — 10) = Tk. 90
Again,
If selling price is Tk. 90 then quoted price = Tk. 100
If selling price is Tk. 432 then quoted price = Tk. $\frac{100×432}{90}$ =Tk. 480
lntial quoted selling price = Tk. $\frac{480}{12}$ = Tk. 40
Question 3:
See explanation
$\frac{x+2y}{a+3b}=\frac{y+3x}{a+4b}$
=>(x+2y) (a+4b)=(y+3x) (a+3b)
=>ax+4bx+2ay+8by=ay+3by+3ax+9bx
=>ax+4bx—3ax-9bx=ay+3by—2ay—8by
=>x(20+ 5b) =y(a+ 5b)
$\frac{x}{x}=\frac{a+5b}{2a+5b}$
TK 128
Present value = Tk. 250
The value after at the end of each year =$\frac{4}{5}$ portion of previous year
The value of cycle after 3 years will be = Tk. 250 $(\frac{4}{5})^{3}$
=Tk. 128
20 %
Let, the number people is 100
Only the television watched = (65 – 25) = 40
Only newspaper read = (40 — 25) = 15
Both read new newspaper and watched television = (25 + 40 + 15) = 80
The people neither watched Television nor read newspaper = (100 — 80) = 20 or 20%
TK 1633.2 (approx.)
Given, Capital = 2000 & rate = 8%
We know, Amount = FV = P$(1+\frac{r}{m})^{nm}$
= 2000$(1+\frac{8}{2×100})^{2×1}$
=2000$(\frac{104}{100})^{2}$
= Tk. 2163.2
Interest earned = (2163.2 — 2000) = Tk. 163.2
Hence, Novel : Science: Business & Economics = 1 : 2 : 14
Given, Novel : Science = 1 : 2
Science : Business & Economics = 1 : 7
Now,$\frac{Novel}{Science} =\frac{1}{2}$
$\frac{Novel}{\text{Science & Economics}} =\frac{1}{7}$
Novel : Science = 1 :2
Science : Economics & Business = l :7 = 2 : 14
Novel : Science: Business & Economics = 1 : 2 : 14
