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3 years ago

9

Olivia has developed a great presentation with a distinct purpose and excellent content. She delivered it in a workshop and got

great feedback on the evaluation form. Because she did such a good job, she intends to use the exact same presentation for the panel discussion she will be in next week. Her coworker has advised against this because _____.
1.a clear central message is not needed for panel discussions
2.less time and depth is required for panel discussions
3.panel discussions require the use of additional special effects
4.workshop presentations need bullet points; panel discussions do not

Computers and Technology

1 answer:

Umnica [9.8K]3 years ago

3 0

less time and depth is required for panel discussions

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Answer:

a. 1365 ways

b. Probability = 0.4096

c. Probability = 0.5904

Explanation:

Given

PCs = 15

Purchase = 3

Solving (a): Ways to select 4 computers out of 15, we make use of Combination formula as follows;

$^nC_r = \frac{n!}{(n-r)!r!}$

Where $n = 15\ and\ r = 4$

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$^{15}C_4 = 1365$

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$q = 1 - 0.2$

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$(p + q)^n = p^n + ^nC_1p^{n-1}q + ^nC_2p^{n-2}q^2 + .....+q^n$

Where n = 4

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$Probability = ^nC_3pq^3$

Substitute 4 for n, 0.2 for p and 0.8 for q

$Probability = ^4C_3 * 0.2 * 0.8^3$

$Probability = \frac{4!}{3!1!} * 0.2 * 0.8^3$

$Probability = 4 * 0.2 * 0.8^3$

$Probability = 0.4096$

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In probability, opposite probability sums to 1;

Hence;

<em>Probability that at least one is defective + Probability that at none is defective = 1</em>

Probability that none is defective is calculated as thus;

$Probability = q^n$

Substitute 4 for n and 0.8 for q

$Probability = 0.8^4$

$Probability = 0.4096$

Substitute 0.4096 for Probability that at none is defective

Probability that at least one is defective + 0.4096= 1

Collect Like Terms

Probability = 1 - 0.4096

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