Conditional probability formula is:P ( A and B ) = P ( A ) · P ( B / A )0.46 = P ( A ) · 0.31P ( A ) = 0.46 : 0.31P ( A ) = 1.48And this is impossible because 0 ≤ P ( A ) ≤ 1The student obviously made a mistake.
Answer:
3 people
Step-by-step explanation:
$51/$17 = 3 people
- We know to start with $51 dollars because that is the total price of the meal.
- We also know each meal costs $17.
- Next, ask youself what we are trying to find? We are trying to find how many people are eating.
- Therefore to find that we need to take our starting amount $51 divided by $17 because that is the cost of 1 meal.
- $51/$17 = 3 people (whole cost/individual cost = # of people)
- To check this take 3 x 17 = 51 (Now we know it is correct)
- If you would like a further explanation please let me know.
f(x) = 3x + 1
y = 3x + 1
y - 1 = 3x + 1 - 1
<u>y - 1</u> = <u>3x</u>
3 3
¹/₃y - ¹/₃ = x
y = ¹/₃x - ¹/₃
f⁻¹(x) = ¹/₃x - ¹/₃
f⁻¹(10) = ¹/₃(10) - ¹/₃
f⁻¹(10) = 3¹/₃ - ¹/₃
f⁻¹(10) = 3
It is equal too (10, 3).
Answer: There are 9 sections of group of 2 and 15 sections of group of 4.
Step-by-step explanation:
Since we have given that
Let the number of sections of group of 2 students be 'x'.
Let the number of sections of group of 4 students be 'y'.
So,total number of sections = 24
According to question, it becomes,
Number of students going to dig = 78
So, it becomes,
From, eq(1), we get that
Put in EQ(2), we get that
So, the value of x is 
Hence, there are 9 sections of group of 2 and 15 sections of group of 4.
