Compute the probability of X successes, using Table B in

Josalynn

Josalynn

Answered question

2021-09-23

Find the probability of X successes in table B of appendix A.
n=12,p=0.90,x=2 
I believe they are using the the binomial probability formula and im not sure how to start if you can give a step by step anwser explanation that would be helpful.

Answer & Explanation

Clelioo

Clelioo

Skilled2021-09-24Added 88 answers

Step 1
It is given that n=12,p=0.90 and X=2.
The probability mass function of binomial distribution is given below:
P(X=2)=12C2(0.90)2(10.90)122
=12!2!(122)!(0.90)2(0.10)10
nCr=n!r!(nr)!
nn(n1)(n2)3×2×1
=0.00000001
Step 3
Hence, the probability of X success is 0.00000001.
Using the binomial probability distribution table, with X=2,n=12 and p=0.90, the probability of X success is 0.00000001.

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