Page 11 - Grade 10 C.Math

;dfwfg

dfgf}F, k':tsfno ;'ljwf ePsf ljb\ofnosf] ;d"x L, U
L C
sDKo'6/ k|of]uzfnf ePsf ljb\ofnosf] ;d"x C / 20% 10%
35%
lj1fg k|of]uzfnf ePsf ljb\ofnosf] ;d"x S x'g\ . 10%
5% 10%
Curriculum Development Centre
k|Zgfg';f/, lbOPsf tYofª\sx¿nfO{ e]glrqdf k|:t't ubf{
5%
e]glrqsf] cjnf]sgaf6 ljj/0fnfO{ k|ltztsf] ¿kdf lnFbf,
S
n(U) = 100, n(L) = 70, n(C) = 50, n(S) = 30, n(LCS) = 10

n(L  C  S) = 35 + 20 + 10 + 5 + 10 + 10 + 5 = 95

t;y{ sDtLdf Pp6f dfq ;'ljwf ePsf ljb\ofno ;ª\Vof = 160 sf] 95% = 152 cf]6f -k'gM
k|ltztnfO{ ;ª\Vofdf JoSt ubf{ ._

{
'
]
'
\
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'
-s_ pkoSt sg klg ;ljwf gePsf ljbofno ;ªVof = n(U) – n(L  C  S) = 160 - 152 = 8 cf6f
-v_ o;} e]glrqaf6 s'g} Pp6f dfq ;'ljwf ePsf] ljb\ofno
'
]
|
|
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]
= k:tsfno dfq ePsf ± sDKo6/ kofuzfnf dfq ePsf ± lj1fg kofuzfnf dfq ePsf
= 35% + 10% + 5% = 50%
Pp6f dfq ;'ljwf ePsf ljb\ofno ;ª\Vof = 160 sf] 50%

= = 80 cf]6f
cEof; 1.2

1. ;Fu}sf] e]glrqsf] cjnf]sg u/L lgDg ;d"xsf] u0fgfTds ;ª\Vof kTtf nufpg'xf];\ M

(i) n(A) (ii) n(B) (iii) n(C)

(iv) n(A  B) (v) n(B  C) (vi) n(A  B  C)
A 5 B U
(vii) n(A - B) (viii) n(C - A) (ix) n(A  B  C) 4 20 10
2 8 28 25 15
(x) n{A  (B - C)} 16 24
12 30
6 18
C

8 ul0ft, sIff – 10