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3 years ago

A number is chosen at random from the integers 10 to 30 inclusive. Find the probability that the number is a multiple of 3.

Mathematics

2 answers:

kirill [66]3 years ago

8 0

Answer:

For each part, find how many numbers have the stated characteristic, then divide by 21.

e.g. multiples of 5:

these would be 10, 15, 20, 25, and 30

so prob (a multiple of 5 ) = 5/21

Do the others the same way

DerKrebs [107]3 years ago

8 0

Answer:

For each part, find how many numbers have the stated characteristic, then divide by 21.

e.g. multiples of 5:

these would be 10, 15, 20, 25, and 30

so prob (a multiple of 5 ) = 5/21

Do the others the same way

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scoundrel [369]

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Step-by-step explanation:

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3 years ago

-7.66666, \sqrt(50,) -(157)/(20), -7.64 list these from least to greatest.

blagie [28]

Answer:

From least to greatest, the correct order is: $-\frac{157}{20}$ ; -7.666....; -7.64; and $\sqrt{50}$ .

Step-by-step explanation:

Since $\sqrt{50}$ is the only positive number, that means that it will be the greatest number on the list. $-\frac{157}{20}$ is equivalent to -7.85, which makes it the smallest number. So you can conclude that the correct order is $-\frac{157}{20}$ ; -7.666...; -7.64; and $\sqrt{50}$ .

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2 years ago

A box contains 3 black pens, 7 blue pens, and 5 red pens. She pulls a red pen, puts it back, pulls a blue pen, puts it back, and

saveliy_v [14]

Answer:

7/25

Step-by-step explanation:

Probability is the likelihood or chance that an event will occur.

Probability = expected outcome/total outcome

If the box contains 3 black pens, 7 blue pens, and 5 red pens, the total number of pens in the box is 3+7+5 = 15pens

Probability of pulling a red pen and replacing = 5/15 = 1/3

Probability of pulling a blue pen and replacing = 7/15

Probability of pulling a black pen and not replacing(using it) = 3/15

{Note that the total number of outcome used will still be 15 since the black pen was pulled out last even though it wasn't replaced.}

P(red, then blue, then black) = 1/3×7/15×3/15

= 63/225

= 7/25

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3 years ago

I need help with Geometry

Neko [114]

Answer:

Yes, this set of lengths can form a triangle.

Step-by-step explanation:

55+76 = 131

131 > 112

Since the sum of smaller lengths is greater than 112, these numbers can form a triangle.

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2 years ago

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Answer:

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