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slamgirl [31]
3 years ago
12

Type the correct answer in each box. Round your answers to the nearest hundredth.

Mathematics
1 answer:
Juliette [100K]3 years ago
6 0

Answer:

Question 1: The probability that a bus is owned by Jerry, given that it runs on time:

  • <u> 3/4</u>

Question 2: The probability that a bus is owned by Jerry, given that it runs late

  • <u>7 / 52</u>

Explanation:

A two-way table is very good to deal with these kind of probability questions because helps you to determine the every subset.

I will guide you on how to build the two-way table.

Identify the possible sets. These are:

  • Buses operated within a particular town (100)
  • Buses that run on time
  • Buses that run late
  • Buses owned by Jerry
  • Buses not owned by Jerry.

With that, you start to build your table:

<u>1. Start</u>

                                       Run on time         Run late        Total

Owned by Jerry

Not owned by Jerry

Total                                                                                      100

Now, lets fill using each statement:

<u>2. 48 usually run on time</u>

                                          Run on time         Run late        Total

Owned by Jerry                                                                

Not owned by Jerry

Total                                          48                                         100

<u>3. 36 of these are owned by Jerry:</u>

                                          Run on time         Run late        Total

Owned by Jerry                      36

Not owned by Jerry

Total                                        48                                            100

<u />

<u>4. Of the 52 buses that usually run behind, only 7 are owned by Jerry:</u>

                                          Run on time         Run late        Total

Owned by Jerry                      36                        7                  43

Not owned by Jerry

Total                                         48                       52               100

You may even fill the second row, but you will not need it to answer the questions.

<u>5. Complete the table using differences:</u>

                                          Run on time         Run late        Total

Owned by Jerry                      36                        7                  43

Not owned by Jerry                12                        45                57

Total                                        48                        52               100

<u>6. Answer the questions:</u>

<u>Question 1</u>: The probability that a bus is owned by Jerry, given that it runs on time:

  • Probability of an event = # favorable outcomes / # total outcomes

  • Probability that a bus owned by Jerry, given that it runs late = # buses owned by Jerry that runs on time / # buses that run on time = 36 / 48 = 3/4

<u>Question 2</u>: The probability that a bus is owned by Jerry, given that it runs late

  • Probability that a bus is owned by Jerry, given that it runs late = # buses owned by Jerry that run late / # buses that run late = 7 / 52
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