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svlad2 [7]
3 years ago
14

ou draw one card from a​ 52-card deck. Then the card is replaced in the deck and the deck is​ shuffled, and you draw again. Find

the probability of drawing a nine the first time and a heart the second time
Mathematics
1 answer:
julsineya [31]3 years ago
3 0

Answer: Our required probability is \dfrac{1}{52}

Step-by-step explanation:

Since we have given that

Number of cards in a deck = 52

Number of nines = 4

Number of hearts = 13

It is the case of replacement.

Probability of drawing a nine the first time and a hear the second time is given by

\dfrac{4}{52}\times \dfrac{13}{52}\\\\=\dfrac{1}{13}\times \dfrac{1}{4}\\\\=\dfrac{1}{52}

Hence, our required probability is \dfrac{1}{52}

You might be interested in
a report in a newspaper or magazine, or on the Internet that uses results from a survey. Evaluate how the survey uses ratios to
gavmur [86]

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5 0
3 years ago
Find the slope of the line that passes through Point A $$(​−5,7) and Point B $$(2,5), using the formula $$m=
tester [92]

Answer:

slope = - \frac{2}{7}

Step-by-step explanation:

Calculate the slope m using the slope formula

m = \frac{y_{2}-y_{1}  }{x_{2}-x_{1}  }

with (x₁, y₁ ) = (- 5, 7 ) and (x₂, y₂ ) = (2, 5 )

m = \frac{5-7}{2-(-5)} = \frac{-2}{2+5} = - \frac{2}{7}

8 0
2 years ago
Please help,I don’t get this and my friends also need your help
ira [324]
STEP 1:
Add the number of total students
= 27+25+23
=75


STEP 2:
Find the percentage that 18 out of 75 students is.

18/75=x/100

cross multiply
(18*100)=(75*x)

1800=75x
divide both sides by 75
24%=x

Check:
75 * 24%= 18

Hope this helps! :) Good luck!
8 0
3 years ago
Hank scored 56% in math and 84% in science. What are three ratios of his science to math scores?
andrew-mc [135]

Answer:

56/84=2/3

2:3

3x-x+2=4

Step-by-step explanation:

4 0
3 years ago
HELP!! please, quick!
erik [133]
A because if the answers are all determined then you would have to doactuakly see them in the number line
7 0
3 years ago
Read 2 more answers
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