3 years ago

What is the probability that the code number for a new customer will begin with a 7

Mathematics

1 answer:

garik1379 [7]3 years ago

4 0

The answer would most likely be 20%

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Vesna [10]

All there is, is a picture. Is there a question?

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3 years ago

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What is the product of the polynomials below? (6x^2-3x-6)(4x^2+5x+4)

Lunna [17]

Answer:

(6 - 5x(2))(x(4) - x(3))

(6 - 5x^2) (x^4 - x^3)

6x^4 - 6x^3 - 5x^6 + 5x^5

-5x^6 + 5x^5 + 6x^4 - 6x^3

Step-by-step explanation:

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4 years ago

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Think of a number . Multiply by 6 and add 5 is 11.Frame an equation and<br><br>solve .

motikmotik

Answer:

x=1

Step-by-step explanation:

6x+5=11

6x=11-5

6x=6

x=1

8 0

3 years ago

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3 and 7/10 x 4 and 4/5<br> Please help<br> I want to now if my answer is correct

BabaBlast [244]

The answer is 17 and 19/25

3 0

3 years ago

The scores for a certain test of intelligence are normally distributed with mean 85 and standard deviation 11. Find the 90th per

jonny [76]

Answer:

99.1 is the 90th percentile of these scores.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 85

Standard Deviation, σ = 11

We are given that the distribution of score is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

We have to find the value of x such that the probability is 0.90

$P( X < x) = P( z < \displaystyle\frac{x - 85}{11})=0.90$

Calculation the value from standard normal z table, we have,

$P(z \leq 1.282) = 0.90$

Putting values, we get,

$\displaystyle\frac{x - 85}{11} = 1.282\\\\x = 99.1$

Thus, 99.1 is the 90th percentile of these scores.

5 0

3 years ago