Probability
posted by Tim .
Can someone tell me if I have the correct answers? I am really confused.
Three boys and three girls line up to go in the front door.
In how many ways can they line up?
My answer: 720
How many ways can they line up if the first one in line is a girl and then alternates by gender, a girl, a boy...
My answer: 3*3*3*2*2*1*1=108
Find the probabiltiy that the first person in line is a girl and the line alternates by gender.
My answer: 1/120

first, 6!, correct
second 3*3*2*2*1*1
third: 24/720*1/2
Respond to this Question
Similar Questions

Math
Which of the following are the numbers NOT in correct order from SMALLEST to LARGEST? 
AED 204
Check the Main forum to see which discussion cluster your teacher has assigned you to work with. In this cluster, you and your peers must discuss the effect of at least three of the above misconceptions on education. The one that she … 
math
Five boys and seven girls in a history class will go on a field trip during the Easter vacation. They make a committee of three members to prepare for the trip. What is the probability that this committee will consist of three boys? 
Math check and question
x is a binomial random variable. (Give your answers correct to three decimal places.) (a) Calculate the probability of x for: n = 1, x = 0, p = 0.15 P(x) = Correct: Your answer is correct. . (0.85) (b) Calculate the probability of … 
Math
Hi! Can someone check my answers? Thanks!! Directions: Tell whether the following questions are either permutations or combinations. 1.) Number of ways the Junior class can elect a committee of officers  President, Vice President, 
Math
Hi! Can someone check my answers? Thanks!! Directions: Tell whether the following questions are either permutations or combinations. 1.) Number of ways the Junior class can elect a committee of officers  President, Vice President, 
Math
Which table correctly fills in the ratio table below? 
math
You are writing multiple choice test. Each question has 5 choices, only one of which is correct. You have no idea how to answer three questions. What is the probability that you will get all three of these questions correct if you … 
discrete mathematics
Six discrete mathematics student:Bahirah,Dinesh,Johan,Adam,Felina and Syahirah are going to stand in a line. How many ways can they stand if: a)Syahirah must be in the third position? 
Physics
I drew out image of the situation but still need help. Can someone help with this problem about swinging on wrecking ball when at 1st: wrecking ball is in line with birdbath when at a peak in its trajectory, and in line with front …