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Free_Kalibri [48]
3 years ago
14

What is the expected number of heads that come up when a fair coin is flipped 10 times?

Mathematics
1 answer:
castortr0y [4]3 years ago
6 0
This is a binomial distribution with a probability of success = 0.5 (fair coin).
n=10
so 
mean = E[x] = np =10*0.5 =5
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Zoe payed $18.60 in sales tax and tips for her dinner. The sales tax is 11% and she tipped 20%. What was the price of Zoe's dinn
Mkey [24]

Answer:

56.02 dollars

Step-by-step explanation:

Wanted x, the price before taxes and tip.

sales tax: x * 0.11

+

tip on sales tax: x * 0.11 * 0.2

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tip on price: x * 0.2

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3 years ago
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I think the closest would be 41.5%

Step-by-step explanation:

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3 years ago
Can i get help plzz .....
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Answer:

$0.30

Step-by-step explanation:

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Driving to your friend's house, you travel at an average rate of 35 miles per hour. On your
Mamont248 [21]

Answer:

14 miles.

Step-by-step explanation:

Let the distance traveled from home to destination = x miles.

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Speed while coming back = 40 miles per hour.

Total Time taken for the journey = 45 minutes = 0.75 hours.

Let the time taken while going to friend's house = y hours.

Therefore, the time taken while going to friend's house = (0.75 - y) hours.

To find x and y, model the speeds of both the journeys.

Speed while going to friend's house = Distance/Time.

35 = x/y.

x = 35y (Equation 1).

Speed while coming back = Distance/Time.

40 = x/(0.75 - y).

x = 40(0.75 - y) (Equation 2).

Since x = x, therefore:

35y = 30 - 40y.

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y = 30/75.

y = 0.4 hours.

Put y = 0.4 hours in Equation 1:

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