Mathematics: The probability that an individual is left-handed is 0.19. In a class of 90 students, what is the mean and standard deviation of the number of left-handed students? Round to the nearest hundredth when necessary.

The probability that an individual is left-handed

Ответ:

alonnachambon

07.02.2022

Mathematics

Mean = 17.1

SD = 3.72

Step-by-step explanation:

FROM the question;

n = 0.19 and the probability of success is 0.19

Mean = np = 0.19 * 90 = 17.1

The standard deviation is as follows;

√np(1-p)

SD = √(17.1)(0.81)

SD = √13.851

SD = 3.72

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Ответ:

monaldossari

19.11.2022

Mathematics

Let the three numbers a, b, c, be 2x, 3x, 5x. we know that (2x) ^2+ (3x) ^2 + (5x)^2= 6084x^2 + 9x^2 + 25x^2 = 60838x^2 = 608x^2= 608/38x^2=16x= √16x= 4a= 2x = 2*4=8 b=3x= 3*4=12c = 5x= 5*4=20the three numbers are 8,12,20

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The probability that an individual is left-handed is 0.19. In a class of 90 students, what is the mean and standard deviation of the number of left-handed students? Round to the nearest hundredth when necessary.

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