If there are 48 Boyd and 32 girls in a room, fill out all the possible ratios of boys to girls that could be made.

What is the value of n in the equation -1/2(2n+4)+6=-9+4(2n+1)

Susie wants to take her friend out for lunch.she wants to spend $9.75 each person. how much will she spend in all.

The discrete random variables x and y take integer values with joint probability distribution given by f (x,y) = a(y−x+1) 0 ≤ x ≤ y ≤ 2 or =0 otherwise, where a is a constant. 1 tabulate the distribution and show that a = 0.1.2 find the marginal distributions of x and y. 3 calculate cov(x,y).4 state, giving a reason, whether x and y are independent. 5 calculate e(y|x = 1).