Do you know how many friends he has then you can answer the question

**Answer:**

MMMMMMMMMM

**Step-by-step explanation:**

MMMMMMMMMMMMM

P(Y) = 5/6

Since they are independent, P(X & Y) = P(Y) * P(X)

Therefore:

1/3 = 5/6 * P(X) Change 1/3 to 2/6, then multiply both sides by 6/5

2/6 * 6/5 = P(X)

2/5 = P(X)

Written as a decimal, P(X) = .40

To find an inverse matrix you first have to find the determinant and then put the absolute value of it under a 1. That's what is sitting outside in front of all those matrices. What you have to do now is multiply that determinant by what I teach to my students as the "mixed up matrix". They always remember from that. Change the position of the terms on the major axis (here they are a and d), and then switch the signs on the other 2 terms. Our inverse matrix then is