Adding and subtracting x
Step-by-step explanation:
number of people who do not show up (x) is a binomial variable with probability 0.2.
probability 0, 1 or 2 are no shows is:
C(31,0) 0.2^0 0.8^31 + C(31,1)0.2^1 0.8^30 + C(31,2) 0.2^2 0.8^29
where C(31,x) = number of combinations of 31 items taking x at a time.
= 0.00099 + 0.00768 + 0.0288 = 0.037
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Question:
Adding and subtracting x
Step-by-step explanation:
number of people who do not show up (x) is a binomial variable with probability 0.2.
probability 0, 1 or 2 are no shows is:
C(31,0) 0.2^0 0.8^31 + C(31,1)0.2^1 0.8^30 + C(31,2) 0.2^2 0.8^29
where C(31,x) = number of combinations of 31 items taking x at a time.
= 0.00099 + 0.00768 + 0.0288 = 0.037