Step-by-step explanation:
$35.97 minus $17.99 = $17.98
$17.98 = Two shirts
Divide by two to get the price of one shirt
$8.99
Answer:
Step-by-step explanation:
There is no given equation, so it is impossible to figure this out. I apologize.
9,031 ÷ 71 = 127.197183099
Hope this helps you
Brainliest would be appreciated
-AaronWiseIsBae
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.
