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2 years ago

A number cube is rolled 600 times. Predict how many times a 2 or a 6 would be rolled.

Mathematics

1 answer:

Reil [10]2 years ago

5 0

Answer: Hope this helps sorry for how long it is!

There is a concept of expected value, which is essentially the average you would expect if you were to perform infinitely many attempts.

I have a feeling you are more interested in something closer to a confidence interval.

Rolling a die 600 times, you will have a mean of

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How many ways are there for Alice, Bob, Charlie, David and Eve to line up from left to right, such that Charlie is somewhere to

steposvetlana [31]

Answer:

120 ways

Step-by-step explanation:

Alice, Bob, David, Charlie, Eve

David, Alice, Bob, Charlie, Eve

Alice,David, Bob, Charlie, Eve

Charlie, Eve ,Alice,David, Bob,

Charlie, Eve ,Alice, Bob, David,

Charlie, Eve ,David, Alice, Bob,

Alice,Charlie, Eve , Bob, David,

Alice,Charlie, Eve , David, Bob,

Bob,Alice,Charlie, Eve , David, and so .

This is a permutation question as the order of placing Charlie to the left of Eve is important.

So the total number of people n= 5 and the possible order is 4 keeping Charlie left of Eve. Eve cannot have the last position to keep Charlie on the left.

Using the formula of nPr = n!/ (n-r)! we get

5! / (5-4)! = 120 ways in which Charlie can be placed to the left of Eve.

6 0

2 years ago

Need help with this question ASAP!<br> 20 points!

Delvig [45]

Answer:

6√3

Step-by-step explanation:

Use the sin formula, which is sin = opp / hyp

sin 60 = x / 12

x = 12 sin 60

x = 6√3

4 0

3 years ago

There are 5 green 6 red 3 purple and 4 blue marbles in a bag. If a marble is chosen, then replaced, and a second marble us drawn

Luda [366]

Google the question to find the answer

4 0

3 years ago

What's 99.1 ×0.16 (must show work)

wariber [46]

99.1
x0.16

6(1)=6
6(9)=54. Put down the 4 and carry the 5.
6(9)=54+5= 59.

You work in reverse, so our last number should be first and our first number last. So the first number is: 5946

Our next row, we put down a 0 and then continue.
1(1)=1
1(9)=9
1(1)=9

Our second number is 9910.

Add the two: 5946+9910=15856

Count the number lf decimal places. In this case, three. Move the decimal 3 places left: 15.856

I always double check using a calculator.

**Sorry the methods it's written out in isn't better, but I can't upload pictures. Hope it helps.

8 0

3 years ago

Read 2 more answers

Which system is equivalent to 3x squared - 4y squared = 25 over -6x squared -2y squared = 11

TEA [102]

So we are given the following system:
$3x^2-4y^2=25\\
-6x^2-2y^2=11\\\text{Multiply the second equation by -2:}\\12x^2+4y^2=-22\\\text{Add to the first equation we get:}\\15x^2=3
\text{ therefore }x=\pm \sqrt{ \frac{1}{5} }$
Using the first equation again we get:
$3x^2-4y^2=25\\
3x^2=4y^2+25\\
x^2= \frac{1}{3}(4y^2+25)\\x^2= \frac{1}{3}(4 \frac{1}{5} +25)\\= \frac{43}{5}\\x=\pm \sqrt{ \frac{43}{5} }$

3 0

3 years ago