What is the missing numbers in the pattern _,_, 36, 108, 324
2 answers:
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Answer:
There is a 75.65% probability that at least 5 teenagers in a group of 7 watched a rented movie at least once last week.
Step-by-step explanation:
For each teenager, there are only two possible outcomes. Either they watched a rented video at least once during a week, or they did not. This means that we can solve this problem using the binomial probability distribution.
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.
In which is the number of different combinatios of x objects from a set of n elements, given by the following formula.
And p is the probability of X happening.
In this problem we have that:
The probability that a randomly selected teenager watched a rented video at least once during a week was 0.75. This means that .
What is the probability that at least 5 teenagers in a group of 7 watched a rented movie at least once last week?
Group of 7, so .
.
In which
So
.
There is a 75.65% probability that at least 5 teenagers in a group of 7 watched a rented movie at least once last week.