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kherson [118]
2 years ago
10

Try to estimate the probability you'd turn on the radio and hear a song you were thinking about. In other words, estimate the pr

obability of the combined event P(thinking of a song)P(turn on the radio and hear the song).
Take these factors into account:

The likelihood you'd hear the song during a randomly selected time of day (think about how frequently the song plays, at what times of day, and on what stations).
The likelihood your radio will be tuned to a station that plays the song.
The likelihood you'll be thinking of the song at a randomly selected time of day. (Remember that if the song gets a lot of airplay it's more likely that you'll be thinking of it.)

Required:
If the combined events were to occur once, would the probability present compelling evidence that the event wasn't merely a chance occurrence? What if it happened twice in one day?
Mathematics
1 answer:
Black_prince [1.1K]2 years ago
8 0

Probabilities are used to determine the likelihood of events

The value of the probability P(thinking of a song)P(turn on the radio and hear the song) is 0.056

<h3>How to estimate the probability</h3>

To calculate the probability, we make use of the following representations:

  • Event A represents the likelihood of thinking of a song
  • Event B represents the likelihood of turning on the radio and hearing the song

So, we have:

P(thinking of a song)P(turn on the radio and hear the song) = P(A) * P(B)

Assume that:

P(A) = 0.12 and P(B) = 0.47

So, we have:

P(thinking of a song)P(turn on the radio and hear the song) = 0.12* 0.47

Evaluate the product

P(thinking of a song)P(turn on the radio and hear the song) = 0.0564

Approximate

P(thinking of a song)P(turn on the radio and hear the song) = 0.056

Hence, the value of the probability P(thinking of a song)P(turn on the radio and hear the song) is 0.056

Read more about probabilities at:

brainly.com/question/25870256

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Since BC is parallel to DE, triangles ABC and ADE are similar. What are the lengths of the unknown sides?
NikAS [45]

Answer:

C

Step-by-step explanation:

Step 1: find BC

Given Triangles ABC and ADE are similar,

\frac{AB}{AD} = \frac{BC}{DE}

BC = \frac{AB}{AD} x DE

= \frac{8}{8 + 4} x 9

= 6 cm

Step 2: use Pythagorean theorem to find AC and / or AE

Consider triangle ABC,

by Pythagorean theorem,

AB² + BC² = AC²

AC² = 6² + 8² = 100

AC = √100 = 10 (answer... we can see that C is the only one with AC=10.

Step 3: Verify.. even though we know that it is C because AC  = 10,  you can verify that the ansewer is correct by finding CE and confirming that CE=5

By using similar triangles ABC and ADE,

AC/AE = AB / AD

AE = AD/AB x AC = 12/8 x 10 = 15

CE = AE - AC = 15 - 10 = 5 (answer confirmed)

5 0
2 years ago
Boris drove 240 miles using 9 gallons of gas. At this rate, how many gallons of gas would he need to drive 216 miles?
satela [25.4K]
Use proportion to solve this.
240 miles needs 9 gallons
216 miles needs (9÷240) × 216 = 8.1 gallons

Hope it helped!
6 0
3 years ago
Read 2 more answers
A group of 4 friends went out for a special dinner. the items they ordered are listed below
Bond [772]
<h3><em>My friends the answer is 3.</em></h3>

<em>   24.95 + 18.96 + 17.55 + 23.14 + 12.00 + 96.60</em>

<em>   4 divided by 12 is 3</em>

<em></em>

<em></em>

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3 0
2 years ago
Can someone help me asap??
Zepler [3.9K]
You need help on what ?
8 0
3 years ago
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What is summation notation for the series?<br> b. 500+490+480+ . . . . . . . +20+10
marin [14]

The summation notation for the series 500+490+480+ . . . . . . . +20+10 is

25500-10\sum\limits^{50}_{n=1} {n}

A summation notation is used to express a long summation into a single notation.

The given series is:

    500+490+480+ . . . . . . . +20+10

This is an arithmetic series with:

a(1) = 500, and

d = 490 - 500 = -10

The last term is a(n) = 10. Find n first by using the nth term formula of an arithmetic sequence:

a(n) = a(1) + (n-1) . d

10 = 500 + (n-1) . (-10)

10 = 500 -10n + 10

10 n = 500

n = 50

Write the explicit formula for the nth term:

a(n) = a(1) + (n-1) . d

a(n) = 500 + (n-1) . (-10)

a(n) = 500 -10n + 10

a(n) = 510 - 10n

The series is the summation notation from n=1 to n = 50

=\sum\limits^{50}_{n=1} {a(n)}

=\sum\limits^{50}_{n=1} {(510-10n)}

=\sum\limits^{50}_{n=1} {510} -\sum\limits^{50}_{n=1} {10n}

=510\times50-10\sum\limits^{50}_{n=1} {n}

=25500-10\sum\limits^{50}_{n=1} {n}

Learn more about summation notation of a series here:

brainly.com/question/23742399

#SPJ4

7 0
10 months ago
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