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Step2247 [10]
3 years ago
12

How many different committees of 4 people can be chosen from a group of 21?

Mathematics
1 answer:
sdas [7]3 years ago
4 0

Answer:

There are 21 ways to choose the first person, 20 ways to choose the second, 19 ways for the third and 18 ways for the fourth so the answer is 21 * 20 * 19 * 18 = 143640.

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I need help with this question
Dimas [21]

Answer:134

Step-by-step explanation:

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2 years ago
One way to convert from inches to centimeters is to multiply the number of inches by 2.54, How many centimeters are there in ⅕ i
erica [24]

Answer:

  0.508 cm

Step-by-step explanation:

Your problem statement tells you that you can find the number of centimeters by multiplying 1/5 inch by 2.54 cm/in:

  1/5 × 2.54 = 0.508

1/5 inch is 0.508 centimeters

5 0
2 years ago
Read 2 more answers
If sin θ = cos 40°, 0<θ<90°, what is θ?
Bezzdna [24]

Answer:

θ =  50 degrees

Step-by-step explanation:

we have  sin θ = cos 40°

 θ = arcsin ( cos 40°)

and make sure θ is less than 90  and greater than 0

 θ = arcsin (0.766044443)

θ =  50 degrees

3 0
3 years ago
A case in riverhead, new york, nine different crime victims listened to voice recordings of five different men. all nine victims
Alexus [3.1K]

the complete question in the attached figure

1) Find the probability that all nine victims would select the same person. You should enter your answer as a decimal, not as a percent. Do not round, as your answer should be a terminating decimal.

P=(1/5)*(1/5)*(1/5)*(1/5)*(1/5)*(1/5)*(1/5)*(1/5)*(1/5)=0.000000512

2) what is the probability that the first victim picks SOMEONE? ANYONE? 

P=(1/5)=0.20  ---------------- > 20%

3) Now let’s look at victim #2. What is the probability that they pick the same person as victim #1?

P=(1/5)*(1/5)=0.04 --------------> 4%

4) Now let’s look at victim #3. What is the probability that they pick the same person as victim #1?

P=(1/5)*(1/5)*(1/5)=0.008 --------------> 0.8%

5) Now let's look at victim #9. What is the probability that they pick the same person as victim #1? 

P=(1/5)*(1/5)*(1/5)*(1/5)*(1/5)*(1/5)*(1/5)*(1/5)*(1/5)=0.000000512

6) Once you find all those probabilities, what rule would apply?

the probability is given by (1/5)^n

n=number of victims that pick the same person---------> in this problem = 9

P=(1/5)^9= 0.000000512

5 0
3 years ago
Help: Simplifying inside parenthesis first
Ne4ueva [31]

Answer:

4th one

Step-by-step explanation:

a^-2 goes down and become a^2 and

{a}^{2}  \times  {a}^{2}  =  {a}^{4}

b^-1 goes up and become b

{b}^{2}  \times  {b}^{1}  =  {b}^{3}

that why answer is 4th...mark me brainliest please

3 0
3 years ago
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