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Alchen [17]
2 years ago
10

Billy wants to find out which cafeteria food is the favorite in his school for students. He surveys 100 students. 29 students se

lect sub sandwiches, 35 select steak and gravy, and 36 select fried chicken. if you select one of these students. What is the probability it will be a student who prefers chicken
Answer choices
A. 7/20
B. 9/25
C. 40%
D.29/100​
Mathematics
2 answers:
Pani-rosa [81]2 years ago
6 0
9/25 it’s simplified
Yuki888 [10]2 years ago
3 0

Answer:

36% or  9/25

Step-by-step explanation:

35+36+29=100 so 100-35-29=64 and 36 are left so you divide 9/25 and you get 0.36 and you put it into a percentage and the answer is 36% or  9/25.

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Fiesta28 [93]
8 divided by 3.14
12•3.14
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144•3.14 squared

Hope it helped:)
6 0
3 years ago
One hundred items are simultaneously put on a life test. Suppose the lifetimes
romanna [79]

Answer:

a) \mathrm{E}[\mathrm{T}]=\sum_{\mathrm{H}}^{5} \frac{200}{101-i}

b) \mathrm{Var}[\mathrm{T}]=\sum_{k=1}^{5} \frac{(200)^{2}}{(101-i)^{2}}

Step-by-step explanation:

Given:

The lifetimes of the individual items are independent exponential random variables.

Mean = 200 hours.

Assume, Ti be the time between ( i-1 )st and the ith failures. Then, the T_{i} are independent with \mathrm{T}_{\mathrm{i}} being exponential with rate \frac{(101-i)}{200} .

Therefore,

a) E[T]=\sum_{i=1}^{5} E\left[\tau_{i}\right]

=\sum_{i=1}^{5} \frac{200}{101-i}

\therefore \mathrm{E}[\mathrm{T}]=\sum_{\mathrm{H}}^{5} \frac{200}{101-i}

b)

The variance is given by, \mathrm{Var}[\mathrm{T}]=\sum_{i=1}^{5} \mathrm{Var}[T]

\therefore \mathrm{Var}[\mathrm{T}]=\sum_{k=1}^{5} \frac{(200)^{2}}{(101-i)^{2}}

7 0
3 years ago
1.Which expression is equivalent to 3(k x k x k)? Show your work
zhuklara [117]

Answer:

3 k^3

Step-by-step explanation:

3(k x k x k)

k*k*k = k^3

3(k x k x k) = 3 k^3

5 0
3 years ago
Answer quick please !!
lana [24]

Answer:

B -- give brainliest pls

Step-by-step explanation:

5 0
3 years ago
Mulitply 1,0256 and 25.3
FrozenT [24]

Answer:

259476.8

Step-by-step explanation:

Hope this helps :)

6 0
3 years ago
Read 2 more answers
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