The following table shows the probability distribution for a discrete random variable.
x 13| 16 |17| 21| 23| 25 |26 |31
p(x) 0.07 |0.21| 0.17| 0.25| 0.05| 0.04| 0.13| 0.08
what is the mean of this discrete random variable. that is, what is e(x), the expected value of x?

b

step-by-step explanation:

u take $75 minus $60.the anwer/original($75)multiply by 100

option c) graph of line going through 1, 4 and 3, 10

step-by-step explanation:

let y equal to margo's coin collection

let x equal to number of years

at the begining x=0, y=1 → point=(x,y)→point=(0,1)

she adds 3 coins per year, then y=1+3x

at x=1, y=1+3(1)=1+3→y=4→point=(x,y)→point=(1,4)

at x=3, y=1+3(3)=1+9→y=10→point=(x,y)→point=(3,10)

the graph of line going through (1, 4) and (3, 10), then the option c is the correct.