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Vlada [557]
2 years ago
11

If two fair dice (with faces numbered 1,2,3,4,5,6) are tossed together, what is the probability that the total score will be a p

erfect cube?
Mathematics
1 answer:
grin007 [14]2 years ago
6 0

Answer:

\frac{5}{36}

Step-by-step explanation:

There are 6^2=36 non-distinct sums that can be achieved when rolling two fair sided dice.

The smallest of these sums is 1+1=2 and the largest of these sums is 6+6=12. Within this range, there exists only one perfect cube, 2^3=8.

Count how many ways we can achieve a sum of 8 with two dice:

\begin{cases}2+6=8,\\6+2=8,\\3+5=8, \\5+3=8,\\4+4=8\end{cases}\\\\\implies \text{5 ways}

Thus the probability the total score (sum) will be a perfect cube when rolling two fair six-sided dice is equal to \boxed{5/36}

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3 years ago
For the geometric sequence of a1=2 and r=2 find a5
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Answer:

a_5 = 32

Step-by-step explanation:

The nth term for the geometric sequence is given by:

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where,

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As per the statement:

For the geometric sequence of a_1=2 and r=2

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for n = 5;

a_5=a_1 \cdot r^{n-1}

Substitute the given values we have;

a_5 = 2 \cdot 2^4 = 2 \cdot 16

⇒a_5 = 32

Therefore, the value of a_5 is, 32

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