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1) in the lottery game, three numbers are selected from 1,2,3,4,....40. find the probability that the three selected numbers are all even 2) if every possible order of finishing is equally likely in the race with nine constestants, find the probability of picking the first three placegetters...

1) find c if one integral roots of x^2-12x+c=0 double the other root<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p> <o:p></o:p> 2) what are possible values of b if the roots of x^2+bx-36 are integers?<o:p></o:p> <o:p></o:p> 3) for what values of k does...

i haven't done it before so just a bit confusing ... 1) the perimeter of a rectangle is 80 metres and its length is x metres. what are the dimensions of the rectangle that enclose the maximum area? 2) the area of a rectangle is 100 cm2 and one of its sides is x cm. find the minimum perimeter...

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