Recent content by aeubz

Homework Statement You have a fair coin. Your friend has a fair die you flip your coin 10 times. Your friend rolls his die 15 times. What is the probability that you get "heads" exactly the same number of times your friend gets "3" or "5". Leave your answer in the form of a summation. No need...

Ok ok, so by definition, E[X] = sum(n=1 to +oo) n * f(n) where f(n) is the density function. Yes I agree. Thank you very very much for all your help!

Ok so the reason nC1 should not be there is because we only care about the n trial. Right? Still a bit confused about the Expected.. If X is geometric with probability p then E(X) = 1/p = 2 and E(Y) = 3? And e) is P(x=y)= sum(n=1 to +oo) 1/6(1/3)^(n-1) = 1/4 f) is still bothering me a little..

Homework Statement Now you and your fiend play a different game. You flip your coin until it comes up heads the first time. Let X denote the number of flips needed. Your friend rolls its die until it comes up "3" or "5". The first try let Y denote the number of rolls needed. Assume X and Y are...

here is my work the book answer is : [26.1i - 15.1j] lb*ft

staics help please! Please help with this problem.. I'm going crazy. I have attempted the problem and i think my methods are correct. however some algebra mistake is also there i think. im submitting my work on the thread below Question: Determine the resultant moment of the two forces...

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Static's Problem... :( The problem is 3-48. Please check if I did it correctly. The problem is in the pic. file and the solution is attached in another pic. file. Note*: For the solution. Please ignore the upper problem. The solution to the problem that I came up with is the bottom...

Wow... I'm fried from doing this problem... Any help would be nice... A 1000kg weather rocket is launched straight up. The rocket motor provides a constant acceleration for 16s, then the motor stops. The rocket altitude 20s after launch is 5100m. You can ignore any effects of air...