00:01
Hi, in this question, we're given that bonds are evaluated on a scale of 0 to 1, and they need a 0 .55 in order to be considered investment grade, so i guess high enough to invest in.
00:13
But so there's like a probability distribution that defines like what the likelihood of a bond being invested as.
00:20
And it's defined as this piecewise function from 0 to 1 of first it's 4x up until the 1 half mark, and then it's 4 minus 4x.
00:36
So this is our probability distribution and the special point we want, right? so we want the probability that an investment is ranked higher than 0 .55.
00:49
So that's going to be the area underneath this curve to the right.
00:55
So this gives the whole probability distribution of investment, or of evaluations, of bonds, but we only care about when, or we're interested in computing what the probability is, basically that it's greater than 0 .55.
01:12
So if we have our random variable x, random variable of bond evaluation, right, it's a random variable according to this distribution, and we want to evaluate the probability that x is greater than 0 .55...