if-a-and-b-two-numbers-do-not-have-to-be-chosen-randomly-and-with-returns-from-the-set-1-2-3-4-5-what-probability-that-a-b-is-an-integer-

Question Number 76651 by john santu last updated on 29/Dec/19

i f a a n d b t w o n u m b e r s d o n o t h a v e

t o b e c h o s e n r a n d o m l y a n d w i t h

r e t u r n s f r o m t h e s e t {1, 2, 3, 4, 5} . w h a t

p r o b a b i l i t y t h a t \frac{a}{b} i s a n i n t e g e r ?

Answered by benjo 1/2 santuyy last updated on 29/Dec/19

s u p p o s e t h a t A i s t h e o c c u r e n c e

o f a / b i n t e g e r .

n o w n (A) = 10 a n d n (S) = 5 \times 5 = 25

h e n c e P (A) = 10 / 25 = 2 / 5 .

Commented by benjo 1/2 santuyy last updated on 30/Dec/19

1 / 1, 2 / 1, 3 / 1, 4 / \bar{1}, 5 / 1, 4 / 2, 2 / 2, 3, 3,

4 / 4 a n d 5 / 5 s i r

Commented by mr W last updated on 30/Dec/19

h o w d i d y o u g e t n (A) = 10 ?

Commented by benjo 1/2 santuyy last updated on 30/Dec/19

2 / 4 n o t i n t g e r s i r

Commented by mr W last updated on 30/Dec/19

y o u a r e r i g h t i f i t i s d e f i n e d t h a t

a i s t h e f i r s t a n d b i s t h e s e c o n d

n u m b e r d r a w n .

Commented by benjo 1/2 santuyy last updated on 30/Dec/19

y e s s i r . t h a n k s y o u