60 students of a school must take at least one of the three courses for mathematics, physics and chemistry respectively. if a student is randomly picked, what is the probability that he/she takes only one course?


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Question Number 198975 by mr W last updated on 26/Oct/23

$60 s t u d e n t s o f a s c h o o l m u s t t a k e$ $a t l e a s t o n e o f t h e t h r e e c o u r s e s f o r$ $m a t h e m a t i c s, p h y s i c s a n d c h e m i s t r y$ $r e s p e c t i v e l y .$ $i f a s t u d e n t i s r a n d o m l y p i c k e d, w h a t$ $i s t h e p r o b a b i l i t y t h a t h e / s h e t a k e s$ $o n l y o n e c o u r s e ?$
Commented by deleteduser1 last updated on 26/Oct/23

$D o y o u h a v e a n a n s w e r t o t h e q u e s t i o n ?$
Commented by necx122 last updated on 26/Oct/23
It's funny, Mr. W posts a question and no one gives an attempt or can solve��. As for me, I'm trying but not up to the task at the moment.
Commented by deleteduser1 last updated on 26/Oct/23

$I s t h e i n f o r m a t i o n s u f f i c i e n t ?$ $60 s t u d e n t s t a k e a t l e a s t o n e o f t h e c o u r s e s$ $\Rightarrow∣ P u B u C ∣= 60 ? I s t h i s w h a t t h e q u e s t i o n i m p l i e s ?$
Commented by mr W last updated on 26/Oct/23

$e a c h o f t h e 60 s t u d e n t s t a k e s a t l e a s t$ $o n e c o u r s e .$
Commented by mr W last updated on 26/Oct/23

$n o s i r . i^{'} m s t i l l t h i n k i n g a b o u t i t .$
Commented by deleteduser1 last updated on 26/Oct/23

$I g u e s s t h e i n f o r m a t i o n p r o v i d e d i s n o t$ $s u f f i c i e n t t o g e t a n a n s w e r$
Commented by mr W last updated on 27/Oct/23

$i a g r e e w i t h y o u . n o s o l u t i o n!$
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