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Tju [1.3M]
4 years ago
15

A sample of 4 different calculators is randomly selected from a group containing 42 that are defective and 20 that have no defec

ts. What is the probability that all four of the calculators selected are defective? No replacement. Round to four decimal places.
Mathematics
1 answer:
Vladimir [108]4 years ago
8 0

Answer:

0.2006

Step-by-step explanation:

The probability the first calculator is defective is 42/62.

The probability the second calculator is defective is 41/61.

The probability the third calculator is defective is 40/60.

The probability the fourth calculator is defective is 39/59.

The probability all four calculators are defective:

(42/62) (41/61) (40/60) (39/59) = 0.2006

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Answer:

The coordinates of other point are: (5,1)

Step-by-step explanation:

Given coordinates are:

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R(x_1,x_2) = (-1,7)

We have to find the coordinates of other point (x2,y2)

The formula for mid-point is given by:

M(x,y) = (\frac{x_1+x_2}{2}, \frac{y_1+y_2}{2})

Putting the values we get

(2,4) = (\frac{-1+x_2}{2}, \frac{7+y_2}{2})

Putting respective elements equal

\frac{-1+x_2}{2} = 2\\-1+x_2 = 2*2\\-1+x_2 = 4\\x_2 = 4+1\\x_2 = 5\\And\\\frac{7+y_2}{2} = 4\\7+y_2 = 4*2\\7+y_2 = 8\\y_2 = 8-7\\y_2 = 1

Hence,

The coordinates of other point are: (5,1)

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<u>Answer:</u>

The ratio of African Americans to Hispanics Americans present is 16 : 5  

<u>Explanation:</u>

Given the people attending the soccer game were:

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And, 1400 of those were from other ethnic backgrounds

We have to find the Ratio of African Americans to Hispanics Americans

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