a positive real number is 2 less than another when 4 times the larger is added to the square of the smaller the result is 49 fin
1 answer:
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Answer:
a) 0.0245 = 2.45%
b) 0.9483 = 94.83%
c) 0.6931 = 69.31%
Step-by-step explanation:
For each person, there are only two possible outcomes. Either they are independent, or they are not. The probability of a person being independent is independent of any other person. So we use the binomial probability distribution to solve this question.
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 combinations of x objects from a set of n elements, given by the following formula.
And p is the probability of X happening.
It is believed that 12% of voters are independent.
This means that
Survey of 29 people
This means that
a. what is the probability that none of the people are independent? probability =
This is P(X = 0). So
0.0245 = 2.45% probability that none of the people are independent
b. what is the probability that fewer than 7 are independent? probability =
0.9483 = 94.83% probability that fewer than 7 are independent
c. what is the probability that more than 2 people are independent? probability =
Either two or less are, or at least 3 are independent. The sum of the probabilities of these events is decimal 1. So
We want P(X > 2). So
In which
0.6931 = 69.31% probability that more than 2 people are independent