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____ [38]
3 years ago
7

Use the "at least once" rule to find the probability of getting at least one 2 in four rolls of a single fair die.

Mathematics
1 answer:
Alexandra [31]3 years ago
8 0

Answer:

Probability of getting at least one 2 equals 0.5177

Step-by-step explanation:

The probability of at least one success is

P=1-(1-p)^{n}

where,

'p' is probability of success of 1 trail

'n' is number of events

We have probability of getting 2 is 1/6 thus 'p' = 1/6

Applying values we get

P=1-(1-\frac{1}{6})^{4}\\\\P= 0.51177

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If Tracy recycles 5 and each is 25 cents

5 times 0.25 equals 1.25

She would get$1.25 for recycling 5 cans
3 0
3 years ago
2x10^-4 - 1x10^-5 show work. I got an answer of 1.9x10^-4,
oksian1 [2.3K]
\bf \left.\qquad \qquad \right.\textit{negative exponents}\\\\
a^{-{ n}} \implies \cfrac{1}{a^{ n}}
\qquad \qquad
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\qquad \qquad 
a^{{{  n}}}\implies \cfrac{1}{a^{-{{  n}}}}\\\\
-------------------------------

\bf 2\times 10^{-4}-1\times 10^{-5}\implies 2\cdot \cfrac{1}{10^4}-1\cdot \cfrac{1}{10^5}\impliedby 
\begin{array}{llll}
\textit{using the LCD}\\
of~10^5
\end{array}
\\\\\\
\cfrac{2}{10^4}-\cfrac{1}{10^5}\implies \cfrac{(10\cdot 2)~-~(1\cdot 1)}{10^5}\implies \cfrac{20-1}{10^5}\implies \cfrac{19}{10^5}
\\\\\\
19\cdot \cfrac{1}{10^5}\implies 19\times 10^{-5}
8 0
3 years ago
Read 2 more answers
Jake needs to put gas in the delivery van regular gasoline is 3.20 per gallon he only had a $20 bill on him how many gallons can
Fed [463]
Your max amount for this is $20. Let's say x represents the number of gallons.

20 ≥ 3.2x
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4 0
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Divya starts a painting her grandpa's kitchen at 8:15 a.m. She finishes 75 minutes later
Mila [183]

Answer:

9:30 she finishes

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815 plus 75 is 890

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9:30

therefore, it is 9:30

8 0
3 years ago
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