Answer:8
Step-by-step explanation:
We have given test consists of 40 multiple choice questions having five options for each question.
Suppose there is one correct answer to each question
therefore probabilty of getting a correct answer on making a guess is
i.e. 1 out of 5 questions is correct
Using binomial distribution
where n=40 p=
mean of binomial distribution is np
therefore mean of no of correct answers=
=8
6.75 + 3x/8 = 13.25
3x/8 =13.25 - 6.75
3x/8 = 6.5
3X = 6.5 x 8
3x = 52
x= 52/3
So your answer would be 52/3 :)
You have to multiply the total number of possibilities for each character on the tag by each other. The first two are letters so there are 26 different possibilities (A-Z) for those characters. The next four are digits, so there are 10 different possibilities for them (0-9). That would give 26 x 26 x 10 x 10 x 10 x 10 = 6,760,000
Answer: B, $78
Step-by-step explanation:
If the tip is 20% of the dinner cost, then we have to first find what is 20% of 65.
20% x 65 = 13. So the tip for the dinner is 13 dollars.
Now we have to add it to the original dinner cost.
65 + 13 = 78.
Therefore, the total cost of their meal is 78 dollars. So the answer is B, $78!