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m_a_m_a [10]
3 years ago
12

Please help immediately

Mathematics
1 answer:
EleoNora [17]3 years ago
4 0

Answer:

.90(85.00) would give the same result

Step-by-step explanation:

Rhonda is using the total cost of the item ($85.00) multiplied by the discount (10%) to find the total discount:  85 x 0.10 = 8.50.  Once Rhonda subtracts the discount ($8.50) from the total:  $85 - $8.50 = $76.50.  The other way to look at the problem, is that Rhonda is only paying for 90% of the total cost of the items, instead of 100% since she is receiving the 10% discount.  So, she would get the same final total by multiplying the cost of the items ($85.00) by 90%, or 0.90.  

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Answer:

(a)\ P(x = 0) = 0.2725

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Step-by-step explanation:

Given

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This question is an illustration of binomial probability, and it is represented as:

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Solving (a): P(x = 0) --- None has done one time fling

P(x = 0) = ^8C_0* (15\%)^0 * (1 - 15\%)^{8-0}

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P(x \ge 1) =1 - 0.2725

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This is calculated as:

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P(x = 0) = 0.2725

P(x = 1) = ^8C_1* (15\%)^1 * (1 - 15\%)^{8-1}

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P(x = 2) = ^8C_2* (15\%)^2 * (1 - 15\%)^{8-2}

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P(x = 2) = 0.2376

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P(x\le 2) = P(x = 0) + P(x =1) + P(x = 2)

P(x \le 2) = 0.2725 + 0.3847 + 0.2376

P(x \le 2) = 0.8948

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