A card is drawn from a deck of 52 cards find the probability of drawing an 8 or an ace

Mathematics

1 answer:

vazorg [7]2 years ago

5 0

Answer:

15.38% or 0.1538

To know:

[] There are 4 cards that are 8s in a standard 52-card deck

[] There are 4 aces in a standard 52-card deck

Step-by-step explanation:

[] Wanted outcomes divided by possible outcomes

4 + 4 = 8 wanted outcomes

52 possible outcomes

8 / 52 ≈ 0.1538

[] Converting to a percentage

0.1538 * 100 = 15.38%

Have a nice day!

I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly.

- Heather

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Help! please i’m stuck

inysia [295]

There are two equal sides of 8, which means this is an isosceles triangle. With an isosceles triangle, there are also two equal angles (30° each in this case). If angle C equals 30°, then angle B also equals 30°. Subtract angles B and C from the total degrees in a triangle.

Triangles Degrees= 180° total

Find angle A:
= total triangle degrees - < B - < C
= 180° - 30° - 30°
= 120°

ANSWER: Angle A is (B) 120°

Hope this helps! :)

7 0

2 years ago

Systolic Blood Pressure Assume that the mean systolic blood pressure of normal adults is 120 millimeters of mercury and the stan

liq [111]

Answer:

0.1425 = 14.25% probability that the individual's pressure will be between 119.4 and 121.4mmHg.

Step-by-step explanation:

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

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

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

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this question, we have that:

$\mu = 120, \sigma = 5.6$