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3 years ago

9. Find P(rolling 1 or 5) with one number cube.

Mathematics

1 answer:

marta [7]3 years ago

6 0

Answer:

1/3

Step-by-step explanation:

There are 6 possible outcomes when rolling 1 die

1,2,3,4,5,6

P ( 1 or 5) = number of times 1 or 5 happens / total outcomes

= 2/ 6

= 1/3

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adoni [48]

Answer:

Grade B score:

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Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 73.3

Standard Deviation, σ = 9.7

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

Formula:

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

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We have to find the value of x such that the probability is 0.62

$P( X > x) = P( z > \displaystyle\frac{x - 73.3}{9.7})=0.62$

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$\displaystyle\frac{x - 73.3}{9.7} = 0.305\\\\x = 76.26$

We have to find the value of x such that the probability is 0.05

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

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Thus, the numerical value of score to achieve grade B is

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3 years ago

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Aloiza [94]

29
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3-2x (x=29) =55
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