Becky added 273+416 and got 688.Then she checked her answer by adding 688+416.What error did Becky make?Was the sum she found fo
2 answers:
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Answer:
The mean number of adults who would have bank savings accounts is 32.
Step-by-step explanation:
For each adult surveyed, there are only two possible outcomes. Either they have bank savings accounts, or they do not. So we use the binomial probability distribution to solve this problem.
Binomial probability distribution
Probability of exactly x sucesses on n repeated trials, with p probability.
The expected value of the binomial distribution is:
In this problem, we have that:
If we were to survey 50 randomly selected adults, find the mean number of adults who would have bank savings accounts.
This is E(X) when .
So
The mean number of adults who would have bank savings accounts is 32.
The correct answer is: [A]: " 
" .
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<u>Note</u>: "3/4" = "6/8" = "15/20" .
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<u>Note</u>: "3/4" = "6/8" = "15/20" .
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