SOLUTION: Let x be a binomial random variable with n = 7, p = 0.2. Find the following value. (Round your answer to three decimal places.) P(x > 1)

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Question 1206638: Let x be a binomial random variable with n = 7, p = 0.2. Find the following value. (Round your answer to three decimal places.)
P(x > 1)
Found 3 solutions by MathLover1, Edwin McCravy, ikleyn:
Answer by MathLover1(20850)   (Show Source): You can put this solution on YOUR website!
Answer by Edwin McCravy(20064)   (Show Source): You can put this solution on YOUR website!
Let x be a binomial random variable with n = 7, p = 0.2.
Find the following value. (Round your answer to three decimal places.)
P(x > 1)
It is much easier to calculate P(x=0) and P(x=1) and subtract their sum
from 1:







Round to 0.423
 
Edwin
Answer by ikleyn(52898)   (Show Source): You can put this solution on YOUR website!
.

Only a person,  who does not know a subject,  may teach in a way as  @MathLover1 does it.

Her method to solve this problem is a classic example on how a student  SHOULD  NOT  do it.


In that sense,  it is very good that she posted her solution,

because it is good case and good opportunity for me to tell you :   NEVER  do it this way  ( ! )



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