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A box contains 40 number tiles numbered 1 to 40. If a tile is drawn at random, what is the probability that the number drawn is a multiple of 3 or 4? Find P(Multiple of 4 or Multiple of 5)

 Dec 12, 2018
 #1
avatar+98005 
+2

P ( mult 3 or 4) = 

 

P(mult of 3)  + P(mult of 4)  - P(mult 3 and 4) =

 

13/40  +  10/40   -  3/40  =

 

20 / 40  =

 

1 / 2

 

 

cool cool cool

 Dec 12, 2018
edited by CPhill  Dec 12, 2018
 #2
avatar+98005 
+2

P ( mult 4 or 5) =

 

P ( mult 4) +  P (mult 5)  - P (mult 4 and 5) =

 

10/40   + 8/40  - 2/40 =

 

16 / 40  =

 

2 / 5

 

 

cool cool cool

 Dec 12, 2018

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