MATHEMATICS MIDDLE SCHOOL

A jar contains five blue marbles and three red marbles. Suppose you choose a marble at​ random, and do not replace it. Then you choose a second marble. Find the probability of the following event.Both of the selected marbles are red.

Answers

Answer 1
Answer:

Answer:

The probability that both of the selected marbles are red is (3)/(28)

Step-by-step explanation:

Given

Number of red marbles = 3

Number of blue marbles = 5

Required

Probability of selecting two red marbles (without replacement).

First, we need to get the total number of marbles

Total = Red Marbles + Blue Marbles

Total = 3 + 5

Total = 8

Probability is calculated by: Number of required outcome divided by number of possible outcome.

Since there are 3 red marbles out of a total of 8 marbles;

The probability that the first marble you selected is red is 3/8

From the question, you didn't return the marble back to the container.

This means that, there are 2 red marbles and a total of 7 marbles left in the container.

So, the probability that the next marble selected is red is 2/7

Let P(R and R) represent the probability of selecting two red marbles.

This is calculated by multiplying the probability of picking the first red marble and the second red marble.

Hence,

P(R and R) = (3)/(8) * (2)/(7)

P(R and R) = (6)/(56) --- Reduce to lowest term

P(R and R) = (3)/(28)

Hence, the probability that both of the selected marbles are red is (3)/(28)

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What is 3/25 as a percent?

Answers

To write a fraction as a percent, first remember that a percent is a ratio of a number to 100. If we want to write (3)/(25) as a percent, we need to find a fraction equivalent to (3)/(25) that has a 100 in the denominator. We can do this by setting up a proportion.

(3)/(25) = (n)/(100)

Now, we can use cross products to find the missing value.

25n = 300

÷3       ÷3

 N = 12

Therefore, (3)/(25) is equal to (12)/(100) or 12%.
3/25 = 12/100 = 12%

Answer : 12%

Anything over 100 is a percent. 1/100 = 1% 2/100 = 2% etc . . .

Hope that helps and enjoy Brainly :)

Gianna is paid $90 for 5 hours of work.a. At this rate, how much would Gianna make for 8 hours of work?
b. At this rate, how long would Gianna have to work to make $60?

Use a ratio table to solve.

Answers

A for 8 hours of work its 144$
B a little more than 3 hours for 60$
Hope this helps

If we draw a card from a standard 52-card deck, what is the probability that the card is neither a heart nor a queen?

Answers

So here we are being asked to draw a card that isn't a heart or a queen... the amount of cards that are not hearts or queens out of a 52 card deck is 36. So that makes the probability 36/52 if we want to make that a percent then we have to change the denominator to a 100 we end up with this problem:

36/52 = x/100

There are many ways we can solve this. One way being cross multiplying, which I think is the easiest.

If our problem is a/b = c/d we multiply a and d then we multiply b and c

Plugging our original problem into that, we 36 times 100 and 52 times x. That gives us 3600 and 52x

This is now an algebraic problem.

52x=3600

First step, divide each side by 52

We get x=69.2 rounded to the nearest tenth.

So our probability is about 69/100 or 69%


Any Questions?

proability is (desired outcomes)/(total possible outcomes)


total possible outcomes is 52 cards

out of those 52 cards, how many are NOT heart or queen?

hearts is a suit, so 1/4 of the deck (or 52/4=13 cards) are not what we want

queens, there are 4 queens in a deck, but one of them is a queen of hearts. to avoid doublecount, say 3 queens

so total of 13+3=16 cards to not pick

so we have 52-16=36 cards we want to pick

probablity=36/52=18/26=9/13≈63.23%

What’s the answer???

And please explain

Answers

Answer:

35 square units

Step-by-step explanation:

area \: of \: { \parallel}^(gm) = b * h \n = 7 * 5 \n = 35 \: {units}^(2)
Area of a parallelogram is base times height

If a metal sheet is 1.2mm thick how must be put together to have thickness of 1.44 cm

Answers

By stacking 12 metal sheets, each 1.2 mm thick, on top of one another, the combined thickness will be 1.44 cm (14.4 mm).

To achieve a thickness of 1.44 cm, the metal sheets must be stacked on top of each other.

Since the thickness of each individual metal sheet is 1.2 mm, we need to find the number of sheets required to reach 1.44 cm.

First, we convert 1.44 cm to mm, which is 1.44 cm × 10 mm/cm = 14.4 mm.

Next, we divide the total thickness (14.4 mm) by the thickness of each metal sheet (1.2 mm):

Number of sheets = 14.4 mm / 1.2 mm

= 12

Therefore, to achieve a thickness of 1.44 cm, you need to stack 12 metal sheets on top of each other.

Learn more about the conversions here:

brainly.com/question/29262286

#SPJ3
First convert 1.2mm to cm

10mm = 1cm

so 1.2mm = 0.12cm

Then divide 1.44cm by 0.12cm
that equals to 12.

so you need 12 sheets to make it 1.44cm

Divide 1/2/2/5 to got the answer

Answers

im not sure but i think is 6/2
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