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4 years ago

Would someone explain this

Mathematics

2 answers:

Furkat [3]4 years ago

8 0

Answer:

Step-by-step explanation:

3 is the correct answer

Romashka [77]4 years ago

3 0

The answer is C 3n+2

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Consider a binary code with 5 bits (0 or 1) in each code word. An example of a code word is 01001. In each code word, a bit is z

AleksandrR [38]

Answer:

the probability that a code word contains exactly one zero is 0.0064 (0.64%)

Step-by-step explanation:

Since each bit is independent from the others , then the random variable X= number of 0 s in the code word follows a binomial distribution, where

p(X)= n!/((n-x)!*x!*p^x*(1-p)^(n-x)

where

n= number of independent bits=5

x= number of 0 s

p= probability that a bit is 0 = 0.8

then for x=1

p(1) = n*p*(1-p)^(n-1) = 5*0.8*0.2^4 = 0.0064 (0.64%)

therefore the probability that a code word contains exactly one zero is 0.0064 (0.64%)

3 0

3 years ago

At a school, 129 students play at least one sport. This is 30% of the students at the school. How many students are at the sc

kkurt [141]

129/x=30/100
30x=12900
x=430
430 students

3 0

4 years ago

Is 4-6 the same as 4+(-6)? Explain your response.

vova2212 [387]

Answer: Yes, 4-6 is the same as 4 + (-6).

Step-by-step explanation:

One reason why they are the same is because 4 - 6 equals -2 and 4 + (-6) also equals -2. You can turn 4 - 6 into 4 + (-6) by turning the subtraction sign to a plus sign and turn the positive 6 into a negative 6.

4 0

4 years ago

Read 2 more answers

PLEASEEEEEE HELPPPP IM BEGGING ISOMEONE PLEASEEEE

Tcecarenko [31]

Answer:

Reason : by ASA , x = 36

Step-by-step explanation:

∠ABC = ∠EBD (vertically opposite angle)

BC = BD = 54 (same length)

∠BAC = ∠BDE (alternate interior angles)

By ASA , ΔABC ≅ ΔDBE

$54 \times x = 36 \times 54\\\\x = 36$

8 0

3 years ago

Read 2 more answers

Here is a scenario that came up in the nationally syndicated column called "Ask Marilyn" in Parade Magazine. Suppose a certain d

goldenfox [79]

Answer:

Drug User Not a drug user Totals

Test positive 475 475 950

Test negative 25 9025 9050

Totals 500 9500 10,000

Step-by-step explanation:

Drug User Not a drug user Totals

Test positive 475 475 950

Test negative 25 9025 9050

Totals 500 9500 10,000

As we know that 5% of all people are drug users

Total drug users=5% of 10,000=0.05(10,000)=500

Total non drug users= Total people - drug users= 10,000-500=9500

or total non drug users=95% of 10,000=0.95(10,000)=9500

Test is correct for 95% of times means that 95% times drug users test results is positive and non drug users test results is negative.

Test positive for drug user= 95% of 500=0.95(500)=475

Test negative for non drug user= 95% of 500 = 0.95(9500)=9025

Test is correct for 95% of times and it means that 5% of times test is not correct. It means that 5% of times drug users test results is negative and non drug users test results is positive.

Test negative for drug user= 5% of 500=0.05(500)=25

Test positive for non drug user= 5% of 9500 = 0.05(9500)=475

4 0

3 years ago