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3 years ago

What is the answer? (Plz try to explain how to solve thx!)

Mathematics

1 answer:

slamgirl [31]3 years ago

8 0

Answer:

I think your answer would be C I am not sure the way I worked it out says C. I hope this helps you out.

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8. There are 10 balls in a bag numbered from 1 to 10. Three balls are selected at random without replacement.

PIT_PIT [208]

Answer:

a. 720

b. 0.3

Step-by-step explanation:

Three balls are selected at random without replacement.

First ball can be selected in 10 ways

Second ball can be selected in 9 ways

Third ball can be selected in 8 ways

Thus, there are 10×9×8 =720 different ways of selecting three balls.

There are three cases that satisfy this condition

first ball picked is 5, the others are not
first ball is not 5, second is 5, third is not
first and second ball is not five, third ball is 5

Each probabilities are:

$\frac{1}{10} * \frac{9}{9} *\frac{8}{8} =\frac{1}{10}$
$\frac{9}{10} *\frac{1}{9} *\frac{8}{8} =\frac{1}{10}$
$\frac{9}{10} *\frac{8}{9} *\frac{1}{8} =\frac{1}{10}$

Thus, one of the balls selected is the number 5 is then $\frac{1}{10} + \frac{1}{10} + \frac{1}{10} = \frac{3}{10}$

5 0

3 years ago

The electronics store sold 4 laptop computers in one day. The total of the laptops was $3,600. If each laptop cost the same amou

Lina20 [59]

Each laptop will cost $900: $3,600 / 4 = 900

7 0

2 years ago

Read 2 more answers

The difference of three times a number and 4 is negative 19

alekssr [168]

3x-4=-19
you add -4 to both sides and get 3x=15 then divide 3 by both sides and get x=5 (15 divided by 3 is 5)

7 0

3 years ago

Is 5/6 and 9/10 equivalent?

givi [52]

Answer:

No, they are not equivalent.

Step-by-step explanation:

5 0

3 years ago

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Explain the steps for dividing fractions. Use complete sentences. <br><br><br>

Gre4nikov [31]

Answer:

See below

Step-by-step explanation:

Step 1: Take the reciprocal of the divisor

Step 2: Multiply the fractions instead

Step 3: Evaluate

Example:

$\frac{1}{2}\div\frac{2}{3}$

$\frac{1}{2}*\frac{3}{2}$

$\frac{3}{4}$

3 0

2 years ago

Read 2 more answers