MATH HELP PLZZZZZ posi awarded to those who answer...
The access code for a cars security system consists of four digits. The First digit cannot be 5 and the last digit must be odd. How many different codes are available?
I know the number of different codes available for this problem is 4500....but I need to know how to find out that answer.
also this problem:
A certain lottery has 38 numbers. In how many different ways can 4 of the numbers be selected? (assume that order of selection is not important)
i know the answer is 73815 but again i need to know how to end up with that number...
i've looked through my books and can't figure it out so any math wizzes on here... i'd greatly appreciate your help! thanks!
Last edited by skater fo ever; 02-06-2011 at 02:26 PM.
ok, the first digit can be any digit except 6. so there are 9 possibilities for the first digit.
For the second and third digit, you can have any number from 0 to 9, so that 10 possibilities.
the last digit has to be odd, so you can only choose from 1, 3, 5, 7, and 9. thats possibilities for the last digit.
Thus, there are 9 x 10 x 10 x 5 = 4500 different codes available.
2nd one is 38C4 on your calculator. its a combination. it comes out to 73815.
Use the formula nCr where N=38 r=4.
Write it like this
38! / 4! (38 - 4)! = 73815
heres a calculator
http://www.calculatorsoup.com/calcul...mbinations.php
Last edited by readmyname; 02-06-2011 at 02:37 PM.
:/
ah thanks guys!
posi'd both of you.
I am not very strong on math, but there I see that is possible to make a consequence of first three numbers. In the lottery are possible many of combinations and I exactly now that there is the way how to choose the numbers that have the biggest possibily of winning. I am not very sure if I would choose my lucky numbers or the sequence of 777 will make me to win. I do not why but people really believe in the lucky meaning of 777 , it was influenced by gambling and jackpot but in usual life it doesn't mean so. Here https://www.sunsigns.org/angel-number-777-meaning/ you can read the meaning of 777 and be aware that the probability to win would be not very big if you choise 777
Last edited by PapaJohn; 2 Weeks Ago at 06:45 AM.
fucking hell
Originally Posted by Buddig
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