QD=145 4P, 25 . . . :
- ;
- , 5 . ..
.
- : QD= QS. QS=25,
145 4=25
= 120/4=30
, 30%.
- , 5 .. (QS=30), :
145 4=30
=115/4=28,75
28,75%.
2.
25 . .. 4 . .. , 6?
.
MV=PQ, : M - ;
V - ;
P - ;
Q - , .
PQ
=25+4=29
V=6
V=29*6=174
PQ=174 . ..
3.
500 .. , 20% , 25% . , 5 ?
.
Pn = S(1+i)n, S -, i , n - .
S =500, i=0,2, n =5, P = 500(1+0,2)5=500*2,49=1244
5 Pn = S(1+ in)= 500(1+5*0,25)=500*2,25=1125.
.
4.
15 . .. 18 . 22%. :
- ;
- .
.
- =
2. = =20%-22%= 2%