Recent content by pinto89a

Yes, the ' is transpose. I get a11 ^2 + a21 ^2 = 50 a11 * a12 + a21 * a22 = 300 a12 ^2 + a22 ^2 = 1000 but I can't get the fourth equation?

Find X if X' * X = (50, 300) (300, 1000) Then find Y if Y * X = (300, 2000) Problem is that when I try to solve for X (or X') first, I get three equations with four unknowns (a11, a12, a21, a22). Any help?

Ok, I see now.Thank you.

Nr of customers arriving at a shop follow Poisson. In 15, an average of 4 customers arrive. a) A customer has just arrived. Then a minute passed and no one arrived. What is the probability of it takoing at least 5 more min. until another customer arrives? b) Consider 40 non-overlapping...