3 years ago

SOLVE 3x²-7x-12=0 correct answer to 2 decimal places

Mathematics

1 answer:

Bas_tet [7]3 years ago

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3 years ago

Is 32.725 greater or less than 32.735

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Suppose (6,1) is a point on the graph y=f(x) for each statement below, describe the transformation and determine what points (6,

bearhunter [10]

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Step-by-step explanation:

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3 years ago

Find the equation of a line parallel to the line y=-1/3x-1 and passing through the point (3,-3)

victus00 [196]

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3 years ago

There are 30 balls numbered 1-30 in a bag. One is randomly selected 12 times. What is the probability of getting a prime number

Sliva [168]

Answer: The probability of getting a prime number exactly five times = 0.1908

Step-by-step explanation:

Prime numbers from 1 to 30 are 2,3,5,7,11, 13, 17, 19, 23, 29.

The probability of getting a prime number p= $\dfrac{10}{30}=\dfrac13$

Number of trials n = 12

Binomial probability formula:

$P(X=x) = \ ^nC_x p^x(1-p)^{n-x}$

, where x= number of successes

n= number of trials.

x = Number of successes

p= probability of getting one success.

The probability of getting a prime number exactly five times:

$P(X=5)=\ ^{12}C_5(\frac13)^5(1-\frac13)^{7}$

$=\frac{12!}{5!7!}(\frac1{243})(\frac{128}{2187})\\\\=0.1908$

Hence, the probability of getting a prime number exactly five times = 0.1908

4 0

3 years ago