please help Ive submitted this question 3 times I need b and

please help
I\'ve submitted this question 3 times- I need b and c please. It\'s part of the question! Hope you can help..
Do Homework - Melissa s://www.mathxl.com/Student/PlayerHomework.aspx?homeworkld-298790741&que; ork: chapter 4 Ex. Score: 0.33 of 1 pt Score: 96.08% (16.33 of 17 pts) If x is a binomial random variable, use the binomial probability table to find a, P(x

Solution

B) (PX>=11) N = 15, P =0.2

P(X=11)+P(X=12)+P(X=13)+P(X=14)+P(X=15)

= 15C11(O.2)^11*(0.8)^4 + 15C12(0.2)^12*(0.8)^3 + 15C13*(0.2)^13*(0.8)^2 + 15C14(0.2)^14*(0.8)^1 + 15C15(0.2)^15*(0.8)^0 = 0.00001

C)20C18*(0.5)^20 = 0.00018

please help I\'ve submitted this question 3 times- I need b and c please. It\'s part of the question! Hope you can help.. Do Homework - Melissa s://www.mathxl.c

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