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slavikrds [6]
3 years ago
14

Bill wants to see how many times he needs to roll a standard number cube before getting a 5. What is the probability that Bill w

ill roll a 5 on his third roll and not before?
a. 125/1296
b. 25/216
c. 1/6
d. 1/2
Mathematics
2 answers:
chubhunter [2.5K]3 years ago
5 0
5/6 • 5/6 • 1/6 = 25/216 the answer is b
Hoochie [10]3 years ago
4 0

Answer:

The answer is b. 25/216

Step-by-step explanation:

Bill wants to see how many times he needs to roll a standard number cube before getting a 5.

p = \frac{1}{6} (on an average: roll 6 times before getting a 5)

The required probability can be found as :

\frac{1}{5}(\frac{5}{6}* \frac{5}{6}* \frac{5}{6})

= \frac{5}{6}* \frac{5}{6}* \frac{1}{6}

= \frac{25}{216}

So, the answer is b. 25/216

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How to graph f(x)=(x-2)^2+5
tatyana61 [14]

That's a quadratic, a nice parabola in vertex form.


The parabola has a positive x^2 term, so it's a CUP, concave up positive. It will have a minimum at the vertex, which is (2,5). Plot that point.


Now we need a couple of guide points to draw the usual parabola going up from both sides of its vertex. We try x=0 giving (0,9) and see that x=4 also gives 9, (4,9). Plot the parabola through those two points and the vertex and you're done.



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3 years ago
Read 2 more answers
WILL MARK BRAINLIEST
Burka [1]

Answer:

283.3%

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5 0
2 years ago
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Charlie watched 1 3 of a movie in the morning, and he watched some more at night. By the end of the day, he still had 2 5 of the
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Answer: 4/15 of the movie

Step-by-step explanation:

In the morning, Charlie watched ¹/₃ of a movie. He then watched some more at night.

At the end of the day, he still had ²/₅ of the movie to watch.

The proportions of an item must always add up to one. This means that if you added the 1/3 to the 2/5 and then to the fraction Charlie watch at night, they should add up to one.

¹/₃ + ²/₅ + x = 1

x = 1 - ¹/₃ - ²/₅

x = \frac{15 - 5 - 6 }{15} \\\\x = \frac{4}{15}

3 0
3 years ago
While mining, John found a large metal bar that contained 15 pounds of zinc. John also determined that the bar was 60% zinc. Wha
finlep [7]

Answer:

The total weight of the metal bar in pounds is 25 pounds

Step-by-step explanation:

Now, we have a metal bar which has a content of 60% zinc corresponding to 15 pounds.

Mathematically, let’s say the total weight of the metal composite is x pounds. It is 60% of this that is 15 pounds which is the content of the zinc

Mathematically;

60/100 * x = 15

60x = 15 * 100

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x = 1500/60

x = 25 pounds

4 0
3 years ago
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