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moneyman
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 Posted: Sat May 10, 2008 6:49 am Post subject: GMAT Prep Probability |
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In a certain group of 10 members , 4 members teach only French and the rest teach only Spanish or German. If the group is to choose a 3-member committee , which must have atleast 1 member who teaches French, how many different committees can be chosen ?
40
50
64
80
100
Ans E
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CITI29
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| Posted: Sun May 11, 2008 10:54 pm Post subject: |
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1-french and 2 other language : 4!/1!3! * 6!/2!4! = 4*15= 60
2-french and 1 other langauage : 4!/2!2! * 6!/1!5! =6*6= 36
All 3 french : 4!/3!1! = 4
Add all three outcomes : 60+36+4 = 100
correct ans [E] |
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