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Galina-37 [17]
3 years ago
10

Eight white balls and twenty black balls are in a bag. What is the probability of drawing a black ball in one draw?

Mathematics
2 answers:
ANEK [815]3 years ago
7 0

Answer:

Probability of drawing a black ball in one draw = \frac{5}{7} \\

Step-by-step explanation:

The probability of drawing a black ball in one draw

= \frac{Number of black ball}{Total number of balls} \\=  \frac{20}{28} \\= \frac{5}{7} \\

agasfer [191]3 years ago
4 0
Probability is quite simple. In this case, you just need to find the total number of balls (28) and the total number of black balls (20) Now, create a ratio (20/28) Next, simplify it down to 5/7, and that is your answer. I hope that helps! :)
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1. Charles and Cole measured the height of each of their dogs. The heights (at the
Ira Lisetskai [31]

Answer:

C. 3.2

Step-by-step explanation:

Heights of dogs: 10, 22, 15, 12, 16

✔️Find the mean of the data set = \frac{10 + 22 + 15 + 12 + 16}{5} = \frac{75}{5} = 15

✔️Find |data value - mean|:

|10 - 15| = 5

|22 - 15| = 7

|15 - 15| = 0

|12 - 15| = 3

|16 - 15| = 1

✔️Find the sum of |data value - mean| and divide by 10:

\frac{5 + 7 + 0 + 3 + 1}{5} = \frac{16}{5} = 3.2

✅M.A.D = 3.2

7 0
3 years ago
Solve for A: B = 2/5 ( A-9)
tamaranim1 [39]

Answer:

Step-by-step explanation:

B = 2/5(A - 9)

(5/2)B = A - 9

A = 9 + (5/2)B

4 0
3 years ago
Jason spent $46.42 on dinner at hello tokyo. he also spent $21.05 on gas for the car. if his bank account had $60.00, what is hi
AleksandrR [38]

It would be: $60.00 - ($46.42+$21.05)

$60.00 - $67.47 = -$7.47

4 0
3 years ago
Find a degree 3 polynomial P such that P(−1) = −3, P(0) =−2, P(1) = −1, and P(2) = 6.
Aleksandr-060686 [28]

Answer:

Step-by-step explanation:

let polynomial P(x)=ax³+bx²+cx+d

-3=-a+b-c+d

-2=d

-1=a+b+c+d

-1=a+b+c-2

a+b+c=1

-3=-a+b-c-2

a-b+c=1

a+b+c-(a-b+c)=1-1=0

2b=0

b=0

so a+c=1

6=8a+4b+2c+d

6=8a+4b+2c-2

8a+4b+2c=8

4a+2b+c=4

or 4a+0+c=4

4a+c=4

a+c=1

subtract

3a=3

a=1

1+c=1

c=0

reqd .P(x)=1x³-2=x³-2

6 0
3 years ago
A family went out to dinner. their bill was $65.00. they left a 15% tip on top of the bill. which amount is closest to the total
devlian [24]
65 divided by 15 =4.3
8 0
3 years ago
Read 2 more answers
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