Asked by Benjamin | 31st Jan, 2017, 12:29: PM

Expert Answer:

begin mathsize 16px style T h e r e space i s space a space g r o u p space o f space 50 space p e o p l e comma space o u t space o f space w h i c h space 20 space a r e space N V space a n d space 30 space a r e space V.
W h e n space 2 space p e r s o n s space a r e space s e l e c t e d space w i t h o u t space r e p l a c e m e n t comma space t h e n space p r o b a b i l i t y space o f space g e t t i n g space
a space N V space p e r s o n space i n space f i r s t space t r i a l space i s space 20 divided by 50 space a n d space i n space t h e space s e c o n d space t r i a l space i s space 19 divided by 49.
C l e a r l y space t h e space p r o b a b i l i t y space o f space g e t t i n g space a space N V space p e r s o n space i s space n o t space s a m e space f o r space a l l space t r i a l s. space
S o space t r i a l s space a r e space n o t space B e r n o u l l i space t r i a l s.

N o w comma space i f space 1 space p e r s o n space i s space s e l e c t e d comma space t h e n space w e space c a n space a p p l y space B i n o m i a l space d i s t r i b u t i o n. end style

Answered by Rashmi Khot | 31st Jan, 2017, 01:58: PM

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