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nekit [7.7K]
2 years ago
15

A card is selected at random from a pack consisting of a total of 52 cards, including 4 queens and 4 kings. The card is not repl

aced. A second card is selected. Find the probability that the second card is a queen, given that the first card is a king.
Mathematics
1 answer:
Anvisha [2.4K]2 years ago
6 0

analyze problme

the pack has 52 cards

four kings and four queens

rest will be detonated as x

The first card is already a king, so one king is deducted from the pile

so now there is 51 cards, so

4/51 is the chance you will draw a king

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Find the midpoint of the segment formed by the points D(8, 6) and E(4, 10).
bixtya [17]
D (8, 6)
E (4, 10)

x_{midpoint} =  \cfrac{x_D+x_E}{2} = \cfrac{8+4}{2}=6 \\  \\  y_{midpoint} =  \cfrac{y_D+y_E}{2} = \cfrac{6+10}{2}=8


Answer: B. (6, 8)
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3 years ago
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The sum of Eric’s and Bob’s weights is 9 times the difference of their weights. The positive difference of their weights is also
Pie

Answer:

<u>150</u>

Step-by-step explanation:

So I will shorten Eric, and Bob's names as E, and B.

So the equations are this

B-E = B+E - 240, E as Eric, and B as Bob, and this E+B=9(E-B)

Move the variables and you get

-2E =- 240

Just divide them both by -2

and E=120

So when we know the value of E we can just plug it into the 1st question

120+B=9B+1080

Moves the Variables and numbers to the other side

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1200/8= 150

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There is Bob's weight

6 0
2 years ago
) There are 8 children in Sophie's preschool class. During free time yesterday, 1 of them
Klio2033 [76]

Using it's concept, it is found that there is a 0.125 = 12.5% experimental probability that a randomly selected preschooler would choose to read books today.

<h3>What is a probability?</h3>

A probability is given by the <u>number of desired outcomes divided by the number of total outcomes</u>.

For an experimental probability, these numbers of outcomes are taken from previous trials.

In this problem, in the previous trial, one out of eight students read a book, hence:

p = 1/8 = 0.125 = 12.5%.

There is a 0.125 = 12.5% experimental probability that a randomly selected preschooler would choose to read books today.

More can be learned about probabilities at brainly.com/question/14398287

5 0
2 years ago
Eric drew a scale drawing of a country park. The scale he used was 1 inch = 2.5 yards. The picnic area is 80 yards wide in real
Alchen [17]
If 1 inch = 2.5 yards then
x inch = 80 yards
cross multiplying we have:
80 × 1 = x × 2.5
x = 80÷ 2.5 = 32 inches
therefore the picnic area is 32 inches in the drawing.
5 0
3 years ago
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