Page 162 - Bangladesh_classwiz_BOOK2018_rev_Neat

(Key log- a8qP1$30qP1=)

4| ‡Kv‡bv GKwU jUvwi‡Z 570 wU wU‡KU wewµ n‡q‡Q| iwng 15 wU wU‡KU wKb‡Q| wU‡KU¸‡jv fv‡jvfv‡e

wgwk‡q 1 wU wU‡KU ˆ`efv‡e cÖ_g cyi¯‹v‡ii Rb¨ †Zvjv n‡jv| iwn‡gi cÖ_g cyi¯‹vi cvIqvi m¤¢vebv KZ?

mgvavb- 570 wU wU‡KU n‡Z, 1 wU wU‡KU ˆ`efv‡e †Zvjv n‡j, NUbvRM‡Zi †gvU Dcv`vb msL¨v = 570 Ges
1
15
iwn‡gi 15 wU wU‡KU n‡Z 1 wU wU‡KU ˆ`efv‡e †Zvjv n‡j, D³ NUbvi Dcv`vb msL¨v =
1
15 1 15 1
 iwn‡gi cÖ_g cyi¯‹vi cvIqvi m¤¢vebv = = =
570 1 570 38

(Key log- a15qP1$570qP1=)

5| m¤¢vebv wbY©q Ki-

i) ( < −1.78)
ii) ( < 0.56)
iii) ( > −1.45)
iv) ( > 2)
v) (−1.48 ≤ < 2.82)

mgvavb- i) ( < −1.78) Ans- 0.0375

(Key log- CTR41p1.78=)

ii) ( < 0.56)- 0.7123

(Key log- CTR41.56=)
iii) ( > −1.45)- [g‡b ivL‡Z n‡e eo/†ewk PvB‡j e¨envi Ki‡Z n‡e] − 0.92647

157