Let X denote the number of times Ron Weasley manages to irritate Professor Snape in one day. Then X has the following probability distribution: x f(x) 0 0.15 1 0.20 2 0.20 3 0.30 4 0.15 (a) () Find the probability that Ron will get in trouble with Professor Snape at least two times in one day. Round your answe

the probability that Ron will get in trouble with Professor Snape at least two times in one day is 0.7

Step-by-step explanation:

We are given

   X    0         1        2         3        4

P(X)    0.15   0.20   0.20   0.30   0.15

we want Ron Weasley to get in trouble at least two time in one day

that mean X 2

P(X 2) = P(X=2) + P(X=3) + P(X=4)

            = 0.20+0.30+0.15

            = 0.65= 0.7 (rounded to nearest tenth)