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Zarrin [17]
3 years ago
12

A bag contains 3 red cubes, 4 yellow cubes, and 3 green cubes. You choose a cube without looking, note its color, and put the cu

be back in the bag. Suppose you do this a total of 80 times. About how many times would you expect to choose a red or yellow cube?
Mathematics
2 answers:
Alex Ar [27]3 years ago
6 0

Answer:

is it multiple choice that would help

Step-by-step explanation:

Nastasia [14]3 years ago
4 0

Answer:

  • 56 times

Step-by-step explanation:

<u>Total cubes:</u>

  • 3 + 4 + 3 = 10

<u>Number of yellow or red:</u>

  • 3 + 4 = 7

<u>Probability of yellow or red:</u>

  • 7/10

<u>Same probability 80 times:</u>

  • 80*7/10 = 56

Expected number is 56

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Simplify completely 7x^2+140x+700/x^2+10x-24
iren [92.7K]

Answer: 707x^2+150x-24

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3 years ago
The amount of time Ricardo spends brushing his teeth follows a Normal distribution with unknown mean and standard deviation. Ric
Papessa [141]
Let X denote the number of minutes spent brushing his teeth, and let \mu be the mean and \sigma the standard deviation for this distribution.

\mathbb P(X

The z-score corresponding to this probability is approximately z=-0.2533, which means

\dfrac{1-\mu}\sigma=-0.2533\iff\mu-0.2533\sigma=1

Next, (note the sign change)

\mathbb P(X>2)=0.02\implies\mathbb P(X\le2)=\mathbb P\left(\dfrac{X-\mu}\sigma\le\dfrac{2-\mu}\sigma\right)=0.98

The corresponding z-score is approximately z=2.0538, so you have

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7 0
3 years ago
2.75 + negative 1.5
MAVERICK [17]

Answer:

1.25

Step-by-step explanation:

type in your calculator:

-1.5+2.75 OR 2.75-1.5

you should get the same answer

6 0
2 years ago
Read 2 more answers
What is the area??????
Westkost [7]
Your answer would be 91.1 units².
We can split this shape into a trapezium and a semicircle, and then find the area of both and add them.
To find the area of a trapezium, the formula is
(a + b)/2 × h, which means we do 14 (the length of AD) + 8 (the length of BC) = 22, and 22/2 = 11. Then we multiply 11 by the height of the trapezium, which is 6 because 10 - 4 = 6. This gives us the area of the trapezium as 66 units².
To find the area of a semicircle, the formula is πr²/2, and the radius is 4 because the diameter is 8 (16 - 8 = 8). This means we do π4²/2 = 16π\2 = 8π = 25.13.
Then we need to add together 66 and 25.13, which equals 91.13, or 91.1 to the nearest tenth.
I hope this helps!
7 0
3 years ago
Read 2 more answers
Can you help me?! I would really appreciate it
sweet [91]

Answer:

(3 , 8)

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
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