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A spinner is divided into four equal sections that are numbered 2, 3, 4, and 9. The spinner is spun twice.

How many outcomes have a product less than 20 and contain at least one even number?

 

  • 6
  • 8
  • 10
  • 12
 Feb 6, 2018
 #1
avatar+100571 
+2

 

{ 2, 3, 4 ,9 }

 

 

Possible outcomes  =  [ P(4,2) + 4 ]    = [12  +  4]   = 16

 

It may be easier to  look at the possibilities that don't work

 

9 paired with itself, 4 or 3 are not favorable outcomes

So....this is  5 unfavorable outcomes  (9,9), (9,4), (4, 9), (9,3), (3,9)

 

3 paired with itself is also unfavorable

 

So....this is 6 unfavorable outcomes

 

So....there are 10 favorable outcomes

 

(2,2) (2,3) (3,2) (2,4) (4,2) (2,9, (9,2), (3,4) (4,3) (4,4)

 

 

 

cool cool cool

 Feb 6, 2018

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