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2 years ago

a bag contains 20 marbles: 5 red, 5 blue, and 10 yellow what is the possibillity that a red is randomly selected

Mathematics

2 answers:

german2 years ago

4 0

Answer:

25% or 1/4 chance.

Step-by-step explanation:

The red makes up 5 out of the 20 marbles in the bag, which translates to 1/4 or 25% chance or being picked.

Good luck! Hope this helped!

irga5000 [103]2 years ago

3 0

Answer:

25% chance or 1/4 or 5/20

Step-by-step explanation:

All of these provided answers are the same. Since there is 20 marbles and 5 are red you just do 5/20!

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A fair die is rolled three times. What is the probability that the first outcome is less than (and not equal to) the second outc

34kurt

For part (a), first consider the simple case where we roll two dice.What is the probability that the second roll is greater than the first? Assuming a six-sided dice, the total number of outcomes $(i,j)$ is $6^2$.

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3 years ago

The notation Ak meas the matrix A Multiplied with itself k times (a) For the 2×2 identity matrix I, show that I2 =I (b)For the n

djverab [1.8K]

Answer:

Entries of I^k are are also identity elements.

Step-by-step explanation:

a) For the 2×2 identity matrix I, show that I² =I

$I^{2}=\left[\begin{array}{cc}1&0\\0&1\end{array}\right] \times \left[\begin{array}{cc}1&0\\0&1\end{array}\right] \\\\=\left[\begin{array}{cc}1\times 1+0\times 0&1\times 0+0\times 1\\0\times 1+1\times 0&0\times 0+1\times1\end{array}\right] \\\\=\left[\begin{array}{cc}1&0\\0&1\end{array}\right]$

Hence proved I² =I

b) For the n×n identity matrix I, show that I² =I

n×n identity matrix is as shown in figure

Elements of identity matrix are

$\delta I_{ij}=1\quad if\quad i=j\\\delta I_{ij}=0\quad if\quad i\ne j\\$

As square of 1 is equal to 1 so for n×n identity matrix I, I² =I

As mentioned above

$\delta I_{ij}=1\quad if\quad i=j\\\delta I_{ij}=0\quad if\quad i\ne j\\$

Any power of 1 is equal to 1 so kth power of 1 is also 1. According to this Ik=I

6 0

3 years ago

In a large fish tank,1/4 of the fish have black stripes on them.If 16 of the fish have black stripes, what is the total number o

Lyrx [107]

Answer:

64 fish

Step-by-step explanation:

If there is 1/4 fish with black stripes and its a total of 16 then you have to multiple 16 times 4 because theres 4 groups. so 16 times 4 is 64.

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3 years ago

PLEASE HELP VERY URGENT WILL GIVE BRAINILY PLEASE I BEG YOU PLEASE

yuradex [85]

Answer: 20.5 units

Step-by-step explanation:

P=Perimeter

JI=3-(-3)

JI=3+3

JI=6

IK=7-1

IK=6

JK=(6^2+6^2)^1/2 ==> Distance Formula

JK=(36+36)^1/2

JK=(2*36)^1/2

JK=6(2)^1/2

P=JI+IK+JK

P=6+6+6(2)^1/2

P=12+6(2)^1/2

P=20.485 units

P=20.5 units

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1 year ago

Change the fraction to a decimal: 7/3 = _____

ella [17]

Answer:

Divide 7 by 3 and show that 3 repeats by solving a few decimal places.

Step-by-step explanation:

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3 years ago