How many 4 digits members are there,without repitition of digits,if each number is divisible by 5

How many 4 digits members are there,without repitition of digits,if each number is divisible by 5

the walls are adjacent facing each other does this change the question?

I know the answer is 20 but i can't figure it out

Numbers 1 to 16 are written on identical slips of paper and put inside a jar. How many ways can 2 numbers be drawn simultaneously?

I know that the answer 84, but I just can't seem to get that number

Can someone please help?? I Got stuck and I have a test soon!!

A bag contains 20 balls. 8 balls are green, 7 are white and 5 are red. What is the minimum number of balls that must be picked up from the bag blindfolded (without replacing any of it) to be assured...

How many ways are there to put 12 white and 12 black checkers on the black squares of a chess board?

How many ways are there to put 12 white and 12 black checkers on the black squares of a chess board?

Please help me answer the following questions! I'm stuck and keep getting the wrong answer! 1. Find the number of six-letter arrangements that can be made from the letters in the word SYDNEY. 2...

The debate club has 12 members. All the members' names go in the hat for selection of captain and captain's assistant. In how many ways can the two positions be filled?

Monroe High School is going to select a committee. The committee will have a faculty member, a male student, a female student, and a parent. Here are the positions and the people interested in each...

1,1,1,1,1 is a possibility since it is less than 15. list the possible outcomes 1,2,1,1,1 is a different outcome than 1,1,2,1,1. ORDER DOES MATTER

is the situtaion a combination or permutation and how many possible orders can you have

A family consists of a mother, a father, 2 girls and 2 boys. How many different ways can they be arranged in a line if the boys are together and the girls are not? I have no idea how...

Permutations and Combinations

Hi! Just as a follow up question that I don't understand (and if someone could explain how this works) 1) There are 2 red and 4 green identical marbles arranged in a line. How many different arrangements...

The digits and letters can repeat.

find the number of selections of 4 letters from the 9 letters of the word HAPPINESS which contain no Ps and either one or two Ss.

find the number of selections of 4 letters from the 9 letters of the word HAPPINESS which contain no Ps and either one or two Ss.

the no. of four digit even numbers that can be formed with 0,1,2,3,7,8