A sample of 4 different calculators is randomly selected from a group containing 17 that are defective and 37that have no defect
1 answer:
Answer: 0.8025
Step-by-step explanation:
Given : The number of defective calculators : 17
The number of calculators are not defective : 37
Total calculators : 37+17=54
The probability of the calculators are defective :
Binomial distribution formula :-
, where P(x) is the probability of success in x trials, n is total trials and p is the probability of success for one trial.
The probability that at least one of the calculators is defective is given by :-
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Solve for x.
x</span><span>√3=20
divide both sides by </span><span>√3.
x=20/(</span><span><span>√3)
</span>Try not to have square roots (</span><span><span>√)</span> in denomenator so multiply top and bottom by </span><span>√3 and get
x=(20</span><span>√3)/3
x is what we are looking for so the answer is </span>
20<span>√3 m </span><span>ou cerca de 34.64 m</span>