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3 years ago

Isla flipped a coin 30 times. The coin landed heads up 9 times and tails up 21 times.

1 answer:

8 0

A.) Either way the probability would be 1/2 because there are only 2 sides of a coin so fate decides on which side it will land on.

B.)Same as A

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Matt Bonner has 8 dimes, 9 pennies, and 4 quarters in his pocket. If each coin is equally likely to be pulled out of his pocket

Lesechka [4]

Answer:

B. 0.602%

Step-by-step explanation:

Probability is essentially (# times specific event will occur) / (# times general event will occur). Here, we have a few specific events: draw a quarter, draw a second quarter, draw a penny, and draw another penny. The general event will just be the number of coins there are to choose from.

The probability that the first draw is a quarter will be 4 / (4 + 8 + 9) = 4/21.

Since we've drawn one now, there's only 21 - 1 = 20 total coins left. The probability of drawing a second quarter is: (4 - 1) / (21 - 1) = 3/20.

The probability of drawing a penny is: 9 / (20 - 1) = 9/19.

The probability of drawing a second penny is: (9 - 1) / (19 - 1) = 8/18.

Multiply these four probabilities together:

(4/21) * (3/20) * (9/19) * (8/18) = 864 / 143640 ≈ 0.602%

The answer is B.

8 0

3 years ago

Read 2 more answers

-6 + x over 4=-5 what is the value of x

My name is Ann [436]

Answer:x=26

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Pls help, I rlly need help.

riadik2000 [5.3K]

Answer:

AC = 15, CM = 20, CP = 12

Step-by-step explanation:

see the attached picture, I tried to explain as much as possible, the general idea is there are three triangles that are similar to one another and thus in proportion. Therefore you can find missing sides using ratios.

6 0

3 years ago

The junior class of Eastlake High School has 146 students, and 67 of them are girls. How many boys are there in the class?

Katena32 [7]

Hello!

In order to find how many boys there are in the class simply subtract 67 from 146:

146-67= 79

There are 79 boys in the class

I hope it helps!

6 0

4 years ago

Question is below in picture.

Maurinko [17]

Answer:

C. $\sqrt{89}$ cm

Step-by-step explanation:

First, we can start out by stating that this is a right triangle, since it has a right angle, shown by the marker square in the corner of the triangle. The x part, is called the hypotenuse. When finding the value of the hypotenuse, we use a thing called the Pythagorean Theorem. This theorem is :

a^2 + b^2 = c^2

a is one side length, and b is the other. c is the hypotenuse. To find x, the hypotenuse, we simply plug in the values, and solve.

8^2 + 5^2 = c^2

64 + 25 = c^2

89 = c^2

To get c alone, we do the square root of 89.

$\sqrt{89}$ = c

9.43398113 = c

So, the answer is C. $\sqrt{89}$ cm

6 0

2 years ago