Suppose the student guesses the answers, we shall consider this a binomial probability problem of success. This implies that getting a question right is p=1/5.
The number of questions is n=20 questions.
The mean of binomial distribution is
mean=n*p= 20*1/5=4
b] The standard deviation of a binomial distribution is given by:
σ=√(n*p*(1-p))
=√(20*0.2*0.8)
=1.79~1.8
Answer:
μ=4 ; σ=1.8
Answer:
Step-by-step explanation:
Given
Required
Factor
Express 
as 
and 
as 
So, we have:
Apply distributive property
If the entire ray is PQ, then all of those points lie on the ray.
Answer:
I am pretty sure that $15.50 is the answer
Answer:
first graph shows he is standing still
second one is he is at constant speed.
third one is starts running and is speeding up
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