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24.02.2020 •
Mathematics
According to scientific research, the probability that a person between the ages of 20 and 25 having high blood pressure, is only 17 %. In a random survey of 10 people in this age group, what is the probability that two or fewer have high blood pressure?
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Ответ:
Step-by-step explanation:
The probability of having high blood pressure is 17%.
We need to find the probability of 2 or fewer have high blood pressure.
Possibility 1: No one have high blood pressure.
The probability is
.
Possibility 2: Only one have high blood pressure.
The probability is
.
Possibility 3: 2 among the 10 have the high blood pressure.
Any of the possibilities can happen.
Hence, the required probability is
+
+
.
Ответ:
c ; Since -2 is rational and square 3 is irrational, the sum and difference are irrational.
Step-by-step explanation: Just took the test