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andrezito [222]
3 years ago
11

A zoo is open 5 days a week. For one week, zoo attendance per day was 113,185,140,219, and 295. What was the mean number of p

eople visiting the zoo per day?
Mathematics
1 answer:
jarptica [38.1K]3 years ago
8 0
To find the mean of a set of numbers you simply add all the numbers then divide by how many numbers you added

113+185+140+219+295 = 952

952/5 = 190.4 (if you need it rounded, just put 190)
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What divisor is represented by the synthetic division below?  –5 5 x + 5 x – 5
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For this case, the dividend is given by:
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4 0
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A surgical technique is performed on seven patients. You are told there is a 70% chance of success. Use a table to find the prob
kiruha [24]

Answer:

31.77% probability the surgery is successful for exactly five patients.

Step-by-step explanation:

For each patient, there are only two possible outcomes. Either the surgery is successful, or it is not. The probability of the surgery being successful for a patient is independent of other patients. 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.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

A surgical technique is performed on seven patients.

This means that n = 7

You are told there is a 70% chance of success.

This means that p = 0.7

Find the probability the surgery is successful for exactly five patients.

This is P(X = 5).

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 5) = C_{7,5}.(0.7)^{5}.(0.3)^{2} = 0.3177

31.77% probability the surgery is successful for exactly five patients.

5 0
3 years ago
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