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4c1*6c1/(8c3) = 0.429 .. check the answer as I have calculated in mind.. but the method is correct
got the same thing, can u stay on got a couple mroe questions to go
but be quick.. have a n extra class today .. :(
if i was to do this by using probability, i.e 1/8 * 1/8 *1/8 or something what would be the way
this is through probability right?? .. after all probability is Number of arrangement with restriction/All arrangements possible --> This is only formula that you have in probability... everything else is derived from this ... thats the beauty of the subject...
ok got it
okk lets keep it this way ... 1st probability that you would find 1 person (he may or may not be a couple) -- > 1 now we have two cases for the second selection --> second person selected is the other partner of the 1st person --> if it is then we need to have the third person anyone if it is not then we need to have the third person as the other partner of either of the two .. =(1/7 + 2/7)
hope this is clear?
with all steps
with all steps