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Vedmedyk [2.9K]
2 years ago
14

I need help on this question

Mathematics
1 answer:
Morgarella [4.7K]2 years ago
5 0

Answer:

the first one

Step-by-step explanation:

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The probability of drawing a heart from a standard deck of cards is 0.25. You record the car do you draw and return the car befo
Licemer1 [7]

Answer: C) 0.112

Step-by-step explanation:

In binomial distribution with parameters n (Total trails) and p (probability of getting success sin each trial) , the probability of getting success in x trials is given by :-

P(X=x)=^nC_xp^x(1-p)^{n-x}

Given : The probability of drawing a heart from a standard deck of cards is 0.25

Here , getting heart is the success.

Then p= 0.25

For n= 20

The probability that you will draw a heart seven times i.e. x= 7:

P(X=7)=^{20}C_7(0.25)^7(1-0.25)^{20-7}

P(X=7)=\dfrac{20!}{7!(20-7)!}(0.25)^7(1-0.25)^{20-7}\ \ [\because\ ^nC_r=\dfrac{n!}{r!(n-r)!}]

=\dfrac{20\times19\times18\times17\times16\times15\times14\times13!}{7!13!}(0.25)^7(0.75)^{13}\\\\=77520(0.00006103515625)(0.0237572640181)\\\\=0.112406195476\approx0.112

Hence, the probability that you will draw a heart seven times = 0.112

Thus , the correct answer is C) 0.112 .

8 0
2 years ago
BRAINLIEST ANSWERS ONLY.
mars1129 [50]

Answer:

Heyy

Step-by-step explanation:

△ABC is a right angled triangle and right angle at B

sinA=

AC

BC

, cosA=

AC

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AC

BC

+

AC

AB

=

AC

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4 0
2 years ago
How is finding the factors of a number different from finding the prime factorization of a number.
mario62 [17]
When finding factors of a number, you are just finding numbers that can factor into it. When finding the prime factorization, you are narrowing down the factors to the smallest factored numbers.

Ex:     40                 •The bolded numbers are the most simplified factors.
         /    \
       8     5
     /   \
   4    2          The prime factorization of 40 is 5 x 2^3.
  /  \
 2  2
6 0
3 years ago
Let’s say the area of the map is 21 square inches. You want to make an enlarged map of Central Park to take with you on your jou
poizon [28]

Answer:

You could multiply 21*21=441 if its a square

Step-by-step explanation:

5 0
3 years ago
2+3+4+3+5+6+7<br> Anyone want points? Every week once.
Otrada [13]

Answer:

30

Step-by-step explanation:

Thank you! I hope you have a good day :)

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2 years ago
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