Page 161 - Bangladesh_classwiz_BOOK2018_rev_Neat

3| 30 wU wU‡KU 1 †_‡K 30 ch©šÍ µwgK b¤^i †`qv Av‡Q| wUwKU¸‡jv fv‡jvfv‡e wgwk‡q GKwU wU‡KU ˆ`efv‡e

†bqv n‡jv| wU‡KUwU ( ) ‡Rvo msL¨v ( ) Pvi Øviv wefvR¨ ( ) 8 Gi †P‡q †QvU ( ) 22 Gi †P‡q eo nIqvi
©
m¤¢vebv wbYq Ki|
30
mgvavb- 30 wU wU‡KU n‡Z 1 wU wU‡KU ˆ`efv‡e †bqv n‡j, NUbvRM‡Zi †gvU Dcv`vb msL¨v =
1
GLb,

( ) †Rvo msL¨v nIqvi m¤¢vebv- 1 n‡Z 30 Gi g‡a¨ †Rvo msL¨v Av‡Q 15 wU| D³ 15 wU wU‡KU n‡Z 1 wU
15
wU‡KU ˆ`efv‡e †bqv n‡j, †Rvo NUbv NUvi Dcv`vb msL¨v = .
1
15 1 15 1
P (‡Rvo msL¨v) ev †Rvo msL¨v Avmvi m¤¢vebv = = =
30 1 30 2

(Key log- w1a15qP1$30qP1=)

( ) Pvi Øviv wefvR¨ nIqvi m¤¢vebv- 1 n‡Z 30 Gi g‡a¨, Pvi Øviv wefvR¨ msL¨v 7 wU| D³ 7 wU n‡Z 1 wU
7
wU‡K ‰`efv‡e †bqv n‡j, Pvi Øviv wefvR¨ NUbv NUvi Dcv`vb msL¨v =
1
7 1 7
P (Pvi Øviv wefvR¨) = =
30 1 30

(Key log- a7qP1$30qP1=)

( ) 8 Gi †P‡q †QvU nIqvi m¤¢vebv- 1 n‡Z 30 Gi g‡a¨ 8Gi †P‡q †QvU msL¨vwU 7 wU|

7 1 7
P (8Gi †P‡q †QvU) = =
30 1 30

( ) 22 Gi †P‡q eo nIqvi m¤¢vebv- 1 †n‡Z 30 Gi g‡a¨ 22 Gi †P‡q eo msL¨v 8 wU|
8 1 8 4
P (22Gi †P‡q eo) = = = .
30 1 30 15

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