Find the number of three-digit numbers possible if only the digits 0,1,2,3,4and5 may be used,the number must be a multiple of 5,and no digit may be used more than twice in the same number

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/26 04:35:31
Findthenumberofthree-digitnumberspossibleifonlythedigits0,1,2,3,4and5maybeused,thenumbermustbeamulti

Find the number of three-digit numbers possible if only the digits 0,1,2,3,4and5 may be used,the number must be a multiple of 5,and no digit may be used more than twice in the same number
Find the number of three-digit numbers possible if only the digits 0,1,2,3,4and5 may be used,the number must be a multiple of 5,and no digit may be used more than twice in the same number

Find the number of three-digit numbers possible if only the digits 0,1,2,3,4and5 may be used,the number must be a multiple of 5,and no digit may be used more than twice in the same number
一个三位数,只能由0,1,2,3,4,5来组成,它必须是5的倍数,这个数中每个数字使用不能超过2次.这样的数有几个?
必须是5的倍数,说明最后一位只能是0或5.
第一位数可以是1-5中任意一个,第二位数可以是0-5中任意一个,第三位数是0或者5.
概率是5 x 6 x 2 = 60
因为每个数不能用两次以上,上面唯一一个例外是555这个数,去掉以后是59个.
所以可以有59个这样的数.

牙卖得

找到三位数字的数目可用于可能的,如果只有数字0,1,2,3,4和5,这个数必须是5的倍数,也可以使用没有数字的两倍以上的相同数目找到三位数字的数目可用于可能的,如果只有数字0,1,2,3,4和5,这个数必须是5的倍数,也可以使用没有数字的两倍以上的相同数目找到三位数字的数目可用于可能的,如果只有数字0,1,2,3,4和5,这个数必须是5的倍数,也可以使用没有数字的两倍以上的相同数目...

全部展开

找到三位数字的数目可用于可能的,如果只有数字0,1,2,3,4和5,这个数必须是5的倍数,也可以使用没有数字的两倍以上的相同数目

收起

这题目我还真不懂,不能超过5。哎,

hrice a number is greater than 3/4 of the number by 81 ,find the number find the sum of the whole number from 34---100. 英语翻译times the number of men by 32.Find the number of men. Math questions.150 points.The number of hours,H,of daylight in Madrid at paricular time of year may be approximate by H(t)=12+2.4sin[0.0172(t-80)] where t is the number of days since the start of the year.Find the average number of hours of daylight 英语翻译原题:Prime text Description Given a big integer number,you are required to find out whether it's a prime number.Input The first line contains the number of test cases T (1 out of T-pages.please increase the number of 英语翻译Find a linear equation that models the temperature T as a function of the number of chirps per minute N.请问T和N 谁是Y 谁是X 英语翻译Find the number of full houses in a poker hand,that is,the number of poker hands with three of a kind and two of a kind. the sum of the digits of two number is 12.the tens digits is twice the unit digit.find the number 英语翻译Let's see can you find out the number of his flight find the number of 20 and color it中文什么意思 Write a program to find all Armstrong number in the range of 100 and 999. 英语翻译A number is chosen randomly from all of the 2-digit integers ,find the probability that the units digit of the number is 3. a number of the number of the number of,a small number of,a number of. There are 42 students in S1A.The number of boys is 4/3 times that of girls.Find the repective number of boys and girls there. the number of造句 the number of造句