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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}

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Answer:

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(1 / 4) - (1 / 10) = 0.15

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8 0
3 years ago
BRAINLIEST IF CORRECT
Softa [21]

Answer:

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7 0
3 years ago
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jaideep builds a house and sell it for $450000. (a)he pays a tax of 1.5% of the selling price of the house.show that he pays $67
ValentinkaMS [17]

Answer:

$450000*0.015=$6750

Step-by-step explanation:

1.5% as a decimal is 0.015

You then multiply the sale amount by the decimal to get $6750

4 0
3 years ago
How to find Lateral area of this rectangular prism??<br><br>Plzz help me it is due tomorrow!!
yaroslaw [1]

Answer:

132 square millimeters

Step-by-step explanation:

THe <u>lateral area</u> of a rectangular prism is the side areas. That is

all 4 sides of the rectangular prism (that are rectangles each).

So, we find each side area and add them up.

The area of a rectangle is:

Area = length * width

The left side (in gray) is 9 mm x 3mm, so area:

area = 9 * 3 = 27

The right side rectangle is same, so that would have an area of:

area = 9 * 3 = 27

Now, the front side's measurement is 3 x 13, so the area is:

Area = 3 * 13 = 39

THe back is same, so the area would be:

Area = 3 * 13 = 39

<u>Total Surface Area = 27 + 27 + 39 + 39 = 132 square millimeters</u>

6 0
3 years ago
A financial analyst wanted to estimate the mean annual return on mutual funds. A random sample of funds' returns shows an averag
Feliz [49]

A financial analyst wanted to estimate the mean annual return on mutual funds. A random sample of 60 funds' returns shows an average rate of 12%. If the population standard deviation is assumed to be 4%, the 95% confidence interval estimate for the annual return on all mutual funds is

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B. 3.7773% to 20.2227%

C. 59.98786% to 61.01214%

D. 51.7773% to 68.2227%

E. 10.988% to 13.012%

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Given;

Mean x= 12%

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Number of samples tested n = 60

Confidence interval is 95%

Z' = t(0.025)= 1.96

Confidence interval = x +/- Z'(r/√n)

= 12% +/- 1.96(4%/√60)

= 12% +/- 0.01214%

Confidence interval= (10.988% to 13.012%)

3 0
3 years ago
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