Recent content by mtingt

Homework Statement In how many ways can 11 girls and 3 boys be divided into 2 teams of 7 if each team is to include at least 1 boy? Homework Equations The Attempt at a Solution i really have no idea how to approach this question! :(

Homework Statement there are 7 different french books and 7 different Spanish books, how many ways are there to arrange them on a shelf a. books of the same language must be group together, French on left and Spanish on Right? b. French and Spanish books must alternate in the grouping...

Homework Statement A player rolls a fair die and receives a number of dollars equal to the number of dots appearing on the face of the die. What is the least a player should expect to pay in order to play the game? Homework Equations I don't really understand the question?? can...

ok thanks, I put that in online and it said my Max return was wrong, is it because it said 5 years? even if it was 5 years, I multiplied the max return by 5 and it was still wrong? is it just me or something is wrong with the system?

An investment broker wants to invest up to $ 33000 She can invest in two mutual funds based on their yearly average return for the 5 years ending December 31, 2009: the Franklin Natural Resources fund yielding 8% and the Oppenheimer Developing Markets A fund yielding 10% She wants to invest at...

oh wow, i can't believe i made such a stupid mistake, thank you for helping me out

if i use 0 for the winnings that 1 tail occurs that just means i add 0 to the end of my equation? ($26*3/8) + ($13* 2/8) -(26* 4/8) + 0 (1/8) isnt that still the same? so what is wrong with my equation?

A fair coin is tossed 3 times, and a player wins $26 if 3 tails occur, wins $13 if 2 tails occur, and loses $26 if no tails occur. If 1 tail occurs, no one wins. what is the expected value? i don't really understand what does the "if 1 tail occurs , no one wins. how do you set up that...

Product Testing A supposed coffee connoisseur claims she can distinguish between a cup of instant coffee and a cup of drip coffee 75% of the time. You give her 5 cups of coffee and tell her that you will grant her claim if she correctly identifies at least 4 of the 5 cups. (a) What are her...

thanks pshooter that explained so much better!

so i would have to add every single probability up to 22? is there any other way i could do this?

In a 22-item true–false examination, a student guesses on each question. If 14 correct answers constitute a passing grade, what is the probability the student will pass? i did c(22,14)* (1/2)^14 * (1/2)^8

A fair coin is tossed 5 times. What is the probability of obtaining exactly 2 heads if it is known that at least 1 head appeared?