How would I do this? Especially b
#Alevel stats
oblique magnet
weak badger
For a), the sum of probabilities should be 1
So k(2-0) + k(2-1) + k(2-2) + k(3-2) = 1
2k + k + 0k + k = 1
4k = 1
k = 0.25
sinful crypt
b) in order to have x1 + x2 = 5, x1 and x2 will have to be either 2 **and **3 or 3 and 2 (because probability is 0 if x = 4 or 5)
__therefore total probability of getting 5: __
(0 x 0.25) + (0.25 x 0) = 0
where 0 is the probability of x =2 and 0.25 is the probability of x = 3
^ u can get by subbing in k=0.25 into the piecewise function
oblique magnet
Thank you