In a raffle, one ticket will win a $860 prize, and the remaining tickets will win nothing. There are 500 in the raffle. A ticket costs $10. If you
have a ticket, what is the expected value?
$0.86
$1.70
$1.35
$2.35

Tell whether the two rates form a proportion

Whats are the trickiest steps to do when adding or subtracting rational expressions? how does knowledge of rational numbers u in adding and subtracting rational expressions?

The random variable x has probability density function f (x) = k(−x²+5x−4) 1 ≤ x ≤ 4 or =0 1 show that k = 2/9 find 2 e(x), 3 the mode of x, 4 the cumulative distribution function f(x) for all x. 5 evaluate p(x ≤ 2.5). 6 deduce the value of the median and comment on the shape of the distribution.