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nordsb [41]
3 years ago
9

A student draws three cards from a standard deck of cards. If the student replaces the card after each draw, what is the probabi

lity that none of the chosen cards were spades?
A. 3/4

B. 63/64

C. 27/64

D. 1/64

Please help I’ll give brainliest answer
Mathematics
1 answer:
IRINA_888 [86]3 years ago
8 0
C
Because idk it just sounds right
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data was collected at a tennis court. it showed that being older implies that a player will stay for a shorter length of time. w
lapo4ka [179]

Answer:

There is a correlation between age and length of stay. There may or may not be causation. Further studies would have to be done to determine this.

Step-by-step explanation:

The answer was checked

7 0
4 years ago
How do i do 3 part a ?
WINSTONCH [101]


In general the binomial expansion is


(a+b)^n = {n \choose 0} a^0 b^n + {n \choose 1} a^1 b^{n-1} + {n \choose 2} a^2 b^{n-2} + ... + {n \choose n} a^n b^0


So in our case, because we want ascending powers of x we'll write,


(-3x + 1)^{11} =  {11 \choose 0} (-3x)^0 1^{11} + {11 \choose 1} (-3x)^{1} 1^{10} + {11 \choose 2} (-3x)^{2} 1^9  + {11 \choose 3 } (-3x)^3 1^8 + ...


We need to calculate the binomial coefficients:


{11 \choose 0}  = 1


{11 \choose 1}  = 11


{11 \choose 2}  = \dfrac{11 \times 10}{2} = 55


{11 \choose 3}  = \dfrac{11 \times 10 \times 9}{3 \times 2} = 165


(-3x+1)^{11} =  1 (-3x)^0 1^{11}  + 11(-3x)^{1} 1^{10}  + 55 (-3x)^2 1^{9}  + 165 (-3x)^3 1^8 + ...


(1-3x)^{11} =  1 -33 x + 495 3x^2 - 4455 x^3+ ...



6 0
3 years ago
The variable Z is directly proportional to X. When X is 3, Z has the value 54. What is the value of Z when X = 12
Ymorist [56]
Given that z is directly proportional to x, then:
zαx
hence;
z=kx
therefore:
k=z/x
when x=3,z=54
thus;
k=54/3
=18
hence;
z=18x
therefore the value of z when x=12 will be:
z=18*12
z=216
The answer is z=216

3 0
4 years ago
MAJORR HELP!!!
WINSTONCH [101]

Answer:

a)$1628.90

b)$1647.00

c)$1648.72

Step-by-step explanation:

The question is on compound interest.

The formula to apply here is;

A=P(1+\frac{r}{n} )^{nt}

where

  • P=principal /beginning amount
  • r=interest rate as a decimal
  • n=number of compoundings a year
  • t=total number of years

a) If compounded annually, n=1

p=$1000, r=5%=0.05 t=10

Amount will be;

A=1000(1+\frac{0.05}{1} )^{10} \\\\\\A=1000(1.05)^{10} \\\\\\A=1000*1.6289=1628.90

Amount=$1628.90

b) If compounded monthly, n=12

p=$1000, r=5%=0.05, t=10, n=12

A=1000(1+\frac{0.05}{12} )^{12*10} \\\\\\A=1000(1.0042)^{120} \\\\\\A=1000*1.647=1647

Amount=$1647.00

c)If interest compounded continuously, it means the principal is earning interest constantly and the interest keeps earning on the interest earned.Here the formula to apply is;

A=Pe^rt where e is the mathematical constant e=2.71828182846

Hence the amount will be;

A=Pe^{rt} \\\\\\A=1000*e^{0.05*10} \\\\\\A=1000*2.71828182846^{0.5} \\\\\\A=1648.72

Amount=$1648.72

8 0
3 years ago
the regular price of a shirt is $40 during a sale a discount of 20% is given calculate the amount a customer pays for d shirt​
Norma-Jean [14]

Answer:

$32

Step-by-step explanation:

0.8*40

3 0
3 years ago
Read 2 more answers
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