Page 164 - Bangladesh_classwiz_BOOK2018_rev_Neat

6| GKwU cwiwg‡Zv Pj‡Ki Mo = 27 Ges †f`v¼ = 36 n‡j,

( ) (36 ≤ ≤ 42) Gi gvb wbY©q Ki|

( ) ( ( ≤ 15) Ges ( ≥ 45) Gi gvb Zzjbv Ki|

mgvavb-

( ) (36 ≤ ≤ 42)

2
= ( 36−27 ≤ −27 ≤ 42−27 ) [ = 36 ⇒ = 6 ]
6 6 0
= (1.5 ≤ ≤ 2.5)

= 0.0606

(Key log- CTR412.5)pTR411.5)=)

( ) ( ( ≤ 15) = ( ≤ 15−27 )
6

= ( ≤ −2) = 0.02275

(Key log- CTR41p2=)

( ≥ 45) = ( ≥ 41−27 ) = ( ≥ 3)
6

= 0.00135

(Key log- CTR433=)

7| DËiv †nv‡÷‡ji 300 Rb Qv‡Îi Dci Rwic K‡i †`Lv †Mj †h, ˆ`wbK Li‡Pi Mo 68 UvKv I cwiwg‡Zv
e¨eavb 3 UvKv| Qv·`i ˆ`wbK LiP cwiwg‡Zvfv‡e web¨v¯Í|

(i) KZRb Qv‡Îi ˆ`wbK LiP 74 UvKvi †ewk wKš‘ 80 UvKvi Kg nq?
(ii) ‰`wbK LiP

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