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USA
8 Posts

 Posted - 10/17/2007 :  15:56:48 A recent survey claimed that 80% of the troops in Iraq believe that their mission is primarily to retaliate for Saddam's role in the 9/11 attacks. Assuming the claim is accurate.a)if fourteen troops are selected at random, find the probability that exactly twelve believe that their mission is primarily to retaliate for Saddam's role in the 9/11 attacks.

tkhunny

USA
1001 Posts

 Posted - 10/17/2007 :  16:41:31 This is a nice binomial distribution.p = 0.80q = 1-p = 0.20n = 14Pr(14) = p^14Pr(13) = 14*(p^13)(q^1)Pr(12) = ??*(p^12)(q^2)
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