Page 198 - Grade 10 C.Math

PsfO 18
;DefJotf (Probability)

18.0 k'g/fjnf]sg (Review)
Curriculum Development Centre
;DefJotf ;DaGwL cfwf/e"t s'/fx¿ xfdLn] sIff gf}df cWoog ul/;s]sf 5f}F . To;sf
cfwf/df lgDg k|Zgx¿sf] pTt/ lbg'xf];\ M

1. k/LIf0f eg]sf] s] xf] < Pp6f l;SsfnfO{ pkmfbf{ k|fKt x'g] gd'gf If]q n]Vg'xf];\ .

2. cg's"n kl/0ffd ;ª\Vof s]nfO{ elgG5 < Pp6f 8fO;nfO{ pkmfbf{ 36\g ;Sg] 36gfsf]
;DefJotf P(E) s] s] x'g ;S5g\, n]Vg'xf];\ .

3. ;DefJotf :s]n eg]sf] s] xf], n]Vg'xf];\ .

4. tf; (cards) ;DaGwL ;fdfGo hfgsf/L rf6{ agfO{ sIffdf k|:t't ug'{xf\];\ .

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18.1 kf/:kl/s lgifws 36gfx¿sf hf8 l;bwfGt (Addi on Law of Mutually Exclusive Events)

(a) kf/:kl/s lgif]ws 36gfx¿ (Mutually exclusive events) M
Pp6f l;SsfnfO{ Ps k6s pkmfbf{ cu|efu (Head) jf kl5Nnf] efu (Tail) cfpg
;S5 . t/ b'j} Ps ;fy cfpg ;Sb}g . cyf{t H cfpbf T cfpg ;Sb}g jf T cfpFbf H sf]
;Defjgf /xFb}g . To; sf/0f oxfF H / T b'O{ cf]6f 36gfx¿ kf/:kl/s lgif]ws 36gfx¿
x'g\ . To:t} u/L Pp6f 8fO;nfO{ pkmfbf{ PSsf (1) cfpg] 36gf 36\bf afFsL cGo 36\gfx¿

36\g] ;Defjgf (Probability) x'g ;Sb}g . PSsf cfpg] 36\gfn] cGo kfFr cf]6f 36gfx¿sf]
;DefjgfnfO{ lgif]w ub{5 .

t;y{ s'g} klg k/LIf0fdf Pp6f 36\gfsf] ;DefJotfn] csf]{ 36gfnfO{ lgif]w ub{5 eg]

To:tf 36gf (event) nfO{ kf/:kl/s lgif]ws 36gfx¿ (Mutually exclusive events)
elgG5 .

(b) ;DefJotfsf] hf]8 l;b\wfGt (Addi ve laws of probability)
A B
olb s'g} k/LIf0fdf 36gfx¿ A / B kf/:kl/s
lgif]ws 36gfx¿ x'g eg] ltgLx¿sf] ;DefJotf
P(A cyjf B) = P(A) + P(B) x'G5 . o;nfO{ kf/:kl/s

195 ul0ft, sIff – 10