Probabilities!!! HELP MEEEE!!!? - XP Math - Forums

 XP Math - Forums Probabilities!!! HELP MEEEE!!!?

 07-17-2007 #1 limebacardi Guest   Posts: n/a Probabilities!!! HELP MEEEE!!!? How many license plates with three numbers followed by three letters can be created if the letter 'O' and number '0' cannot be used? How many ways could 8 people be lined up? A 20-sided die (numbered 1 through 20) is tossed twice. What is the probability that both rolls will land on a prime number?
 07-17-2007 #2 Romeo Guest   Posts: n/a plates ?people ?dice ?Who cares? I haven't slept in two days and didn't get on here to think, just to relax.
 07-17-2007 #3 SMILEYMILEY5 Guest   Posts: n/a ask a math teacher
 07-17-2007 #4 ksoileau Guest   Posts: n/a license plates: 9^3*25^3line of people: 8!prime die: (8*8)/(20*20)
 07-17-2007 #5 buoisang Guest   Posts: n/a license plate, letN1 = first numberN2 = 2nd numberN3 = 3rd numberL1 = 1st letterL2 = 2nd letterL3 = 3rd letterthenlicense plate = N1 N2 N3 L1 L2 L3There are 9 choices for N1 (1,2, ...,9)There are 9 choices for N2 (1,2, ...,9)There are 9 choices for N3 (1,2, ...,9)There are 25 choices for L1 (A-N, P-Z)There are 25 choices for L2 (A-N, P-Z)There are 25 choices for L3 (A-N, P-Z)number of possible license plates =9 * 9 * 9 * 25 *25 * 25 =11390625line-up problemLineUp = P1 P2 P3 P4 P5 P6 P7 P8there are 8 choices for person 17 choices for person26 choices for person 3, etc.......1 choices for person 8# of ways to line up 8 persons is8 * 7 * 6 * 5 * 4 * 3 * 2 * 1 = 40320 ways

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