Hi  

.....Make | 0-2 | 3-5 | 6-10 | over10 | Total

..Foreign |  41 | 27  | 11   | 21     | 100

Domestic  | 38  | 24  | 13   | 25     | 100

Total     | 79  | 51  | 24   | 46     | 200 

P(Not Foreign|older than 2yrs) 

P(A|B) = P(notF and >2)/P(>2) =  = 62/121

Always check the arithmetic



 

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