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vfiekz [6]
3 years ago
6

A card chosen at random from a deck of 52 cards. There are 4 queens and 4 kings in a deck of playing cards. What is the probabil

ity it is a queen or a king?
Mathematics
1 answer:
Romashka-Z-Leto [24]3 years ago
7 0
.15 or 15% you have (4/52)+(4/54) for queens and kings therefore that’s your probability
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2.5 gallons of the 20% solution must be replaced by the 36% solution.

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The age at which small breed dogs are fully housebroken follows a Normal distribution with mean ms = 6 months and standard devia
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This measure is just 0.17 standard deviations from the mean, so we should not be surprised.

Step-by-step explanation:

Normal probability distribution

When the distribution is normal, we use the z-score formula.

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Z = \frac{X - \mu}{\sigma}

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If the z-score is lower than -2, or higher than 2.5, the score of X is considered unusual.

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Should we be surprised if the sample mean housebroken age for the small breed dogs is at least 2.5 months more than the sample mean housebroken age for the large breed dogs? Explain your answer.

We have to find the z-score for X = 2.5. So

Z = \frac{X - \mu}{\sigma}

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Z = 0.17

This measure is just 0.17 standard deviations from the mean, so we should not be surprised.

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