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3 years ago

Heeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeelp

Mathematics

1 answer:

zheka24 [161]3 years ago

6 0

Answer:

Step-by-step explanation:

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Five good light bulbs and two defective ones were mixed up unknowingly. To identify the defective ones for disposal, the bulbs a

Alexxandr [17]

Answer:

The probability of the event of identifying both the defective bulb in the second attempt is $\frac{1}{21}$ .

Step-by-step explanation:

The number of good light bulbs is 5 and the number of defective bulbs is 2.

It is provided that when a defective bulb is found in the inspection it is disposed.

If a defective bulb is found in the first trial the probability of his event is $\frac{2}{7}$ .

Now the remaining number of bulbs is 6.

If a defective bulb is found in the second trial the probability of his event is $\frac{1}{6}$ .

So the probability of identifying both the defective bulb in the second attempt is:

P (Selecting a defective bulb in 1st attempt) × P (Selecting a defective bulb in 2nd attempt) =

$=\frac{2}{7}\times\frac{1}{6} \\=\frac{1}{21}$

Thus, the probability of the event of identifying both the defective bulb in the second attempt is $\frac{1}{21}$ .

4 0

3 years ago

10x - y = 2 5x + 3y = 5 --

tatyana61 [14]

x= 1/5 +y/10

x=1+ 3y/5

5 0

3 years ago

Write a TRUE statement using the words acute angle and regular octagan. THANK YOU!!

marishachu [46]

In a regular octagon it is impossible to have an acute angle!
Hope this helps!!

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3 years ago

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A plane is defined as what type of figure? A. 1-dimensional B. 2-dimensional C. 3-dimensional D. A plane has no dimensions.

Dmitry_Shevchenko [17]

A plane is defined as a figure that has B, two dimensions.

This question is about definitions, and the definition of a plane is that it is a flat surface with two dimensions. But, since everything in our world is 3 dimensions (everything, even if it looks small, has some kind of depth), there are no planes in our world. A plane also extends infinitely far, and can be named by 3 points on it.

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3 years ago

Shirt $28 Tax Rate 9% tax total

miv72 [106K]

Answer:

Tax is $2.52 and the total is $30.52

Step-by-step explanation:

9% of 28 is 2.52 and yeah.

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2 years ago

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