Math Problem Statement

The following table summarizes the ice cream flavor and topping choices   made by a group of people at an ice cream social.

Number of people who had each: B = Bananas C = Chocolate Chips TOTAL S = Strawberry    22 1e)_________    46 V = Vanilla 1c)_________ 1d)_________ 1a)_________   TOTAL 1b)_________    39    72

Let T = {The set of all people who ate a bowl of ice cream at the social}

#1. Complete the table by answering the questions IN THE ORDER THAT THEY   ARE SHOWN IN THE TABLE.

a) How many people chose vanilla ice cream? 26 Correct b) How many people had bananas on top of their ice cream? 33 Correct c) How many people chose vanilla ice cream with bananas on top? 11 Correct d) How many people chose vanilla ice cream with chocolate chips on top? 15 Correct e) How many people chose strawberry ice cream with chocolate chips on top? 24 Correct

#2. FOR EACH QUESTION BELOW:

  • Select the correct formula to use, for the corresponding question, from the list shown below.

  • Find and round results to the nearest one-hundredth of a percent.

A.
P ( S )

n ( S ) n ( T )   B.
P ( V )

n ( V ) n ( T )   C.
P ( B )

n ( B ) n ( T )   D.
P ( C )

n ( C ) n ( T )

E.
P ( C ∣ S )

n ( C ∩ S ) n ( S )   F.
P ( S ∣ C )

n ( S ∩ C ) n ( C )  

G.
P ( B ∣ S )

n ( B ∩ S ) n ( S )   H.
P ( S ∣ B )

n ( S ∩ B ) n ( B )   I.
P ( T )

1

J.
P ( C ∣ V )

n ( C ∩ V ) n ( V )   K.
P ( V ∣ C )

n ( V ∩ C ) n ( C )

L.
P ( V ∣ B )

n ( V ∩ B ) n ( B )   M.
P ( B ∣ V )

n ( B ∩ V ) n ( V )

columns

Solution

Let's break down the problem and solve it step-by-step.

Completing the table:

We are given the following partial table:

Flavor/Topping ChoicesB = BananasC = Chocolate ChipsTotal
S = Strawberry221e)1e)46
V = Vanilla1c)1c)1d)1d)1a)1a)
Total1b)1b)3972

We are given the values:

  • 1a)1a), total number of people who chose vanilla ice cream = 26
  • 1b)1b), total number of people who had bananas = 33
  • 1c)1c), number of people who chose vanilla ice cream with bananas = 11
  • 1d)1d), number of people who chose vanilla ice cream with chocolate chips = 15
  • 1e)1e), number of people who chose strawberry ice cream with chocolate chips = 24

We can now complete the table using this information.

  1. Total for "V = Vanilla" column (i.e., 1a)1a)): 26
    We already know this value is provided.

  2. Bananas total (row total) (i.e., 1b)1b)): 33
    This is given as the total number of people who had bananas.

  3. Vanilla ice cream with bananas (i.e., 1c)1c)): 11
    This is given.

  4. Vanilla ice cream with chocolate chips (i.e., 1d)1d)): 15
    This is given.

  5. Strawberry ice cream with chocolate chips (i.e., 1e)1e)): 24
    This is given.

Now, we calculate the missing values:

Missing values:

  • The total number of people who chose strawberry ice cream with bananas can be found by subtracting the chocolate chips total for strawberry from the total number of people who had strawberry ice cream: 22=462422 = 46 - 24

  • The total number of people who chose bananas on vanilla ice cream is already given as 11. Therefore, the rest of the people who chose bananas had strawberry ice cream (i.e., 22).

Thus, the complete table is:

Flavor/Topping ChoicesB = BananasC = Chocolate ChipsTotal
S = Strawberry222446
V = Vanilla111526
Total333972

Probabilities:

Next, let's calculate the probabilities based on the formulas.

  1. P(S)=n(S)n(T)=46720.64P(S) = \frac{n(S)}{n(T)} = \frac{46}{72} \approx 0.64 (A)
  2. P(V)=n(V)n(T)=26720.36P(V) = \frac{n(V)}{n(T)} = \frac{26}{72} \approx 0.36 (B)
  3. P(B)=n(B)n(T)=33720.46P(B) = \frac{n(B)}{n(T)} = \frac{33}{72} \approx 0.46 (C)
  4. P(C)=n(C)n(T)=39720.54P(C) = \frac{n(C)}{n(T)} = \frac{39}{72} \approx 0.54 (D)

For the conditional probabilities:

  1. P(CS)=n(CS)n(S)=24460.52P(C|S) = \frac{n(C \cap S)}{n(S)} = \frac{24}{46} \approx 0.52 (E)

Would you like to explore further details on any step? Here are some related questions to consider:

  1. What is the probability that a randomly chosen person had both bananas and vanilla ice cream?
  2. What is the probability that a randomly chosen person had both chocolate chips and vanilla ice cream?
  3. What is the probability that a person who had bananas also had strawberry ice cream?
  4. What is the probability that a person who had vanilla ice cream also had chocolate chips?
  5. What is the probability that a person who had chocolate chips also had vanilla ice cream?

Tip: Conditional probabilities help in finding the likelihood of one event occurring given that another event has already happened.

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Math Problem Analysis

Mathematical Concepts

Probability
Conditional Probability
Set Theory

Formulas

P(S) = n(S)/n(T)
P(V) = n(V)/n(T)
P(B) = n(B)/n(T)
P(C) = n(C)/n(T)
P(C|S) = n(C ∩ S)/n(S)

Theorems

Basic Probability Theorem
Conditional Probability

Suitable Grade Level

Grades 9-12