Would it be 1/9 tat lest i think so
Answer:
The variance for the number of correct answers is 2.8 questions
Step-by-step explanation:
The number of correct answers follows binomial distribution, in which we have:
- n identical and independents events: the 15 questions
- two possibles results that we call success and fail: The answer is correct and the answer is incorrect
- probability p of success and 1-p of fail. Probability 1/4 of get the answer correct and probability of 3/4 of get the answer incorrect. This probabilities are calculated on that way because every question have 4 possible answers and one of which is correct.
So, the variance for a variable x that follows a Binomial distributions is:
V(x)=n*p*(1-p)
Then, the variance for the number of correct answers is:
V(x)=15*(1/4)*(3/4) = 2.8125 ≈ 2.8
Because n is equal to 15, p is equal to 1/4 and (1-p) is equal to 3/4.
Answer:
80 Tenths
800 hundredths
Step-by-step explanation:
Monthly:
There are 12 months in a year. So, all we have to do is divide his yearly salary by 12.
57,852÷12
4,821
So, Jeremy's monthly salary is $4,821.
Weekly:
There are about 52 weeks in a year. So, we need to divide his yearly salary by 52.
57,852÷52
1,112.54
So, Jeremy's weekly salary is $1,112.54.
Answer:
40
Step-by-step explanation:
If you look at the ratios you can see the pattern of the first number being multiplied by 4 everytime. Therefore you must multiply 10 by 4.
