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If two distinct members of the set \(\{ 2, 4, 12, 14, 21, 28, 98 \}\) are randomly selected and multiplied, what is the probability that the product is a multiple of 196? Express your answer as a common fraction.

 Feb 4, 2019

Best Answer 

 #1
avatar+18324 
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How many ways can yo pick two numbers from the list?    7 C  2 = 21 ways to pick two numbers

   only ONE combination , multiplied = 196  (2 x 98) 

  one out of twenty one ways =    1/21

 Feb 4, 2019
 #1
avatar+18324 
+2
Best Answer

How many ways can yo pick two numbers from the list?    7 C  2 = 21 ways to pick two numbers

   only ONE combination , multiplied = 196  (2 x 98) 

  one out of twenty one ways =    1/21

ElectricPavlov Feb 4, 2019

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