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Valentin [98]
3 years ago
14

Reiko takes 2 coins at random from the 3 quarters, 5 dimes, and 2 nickels in her pocket. three coins are tossed. what is the pro

bability of 2 heads and 1 tail? what is the probability that she chooses a quarter followed by a dime?
Mathematics
1 answer:
I am Lyosha [343]3 years ago
5 0
The answers are 3/8 and 1/6.

There are 8 possible outcomes in the sample space for flipping 3 coins.  Of those, 3 include two heads and 1 tail.  This makes the probability 3/8.

Choosing a quarter for the first coin is 3/10, since there are 3 quarters out of 10 coins.  After this, choosing a dime is given by 5/9, since there are 5 dimes out of 9 coins left:
3/10(5/9) = 15/90 = 1/6
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MissTica

Answer:

Use a protractor

Step-by-step explanation:

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5 0
3 years ago
Zelma buys p pounds of bananas for 40 cents per pound. She pays the clerk with a twenty-dollar bill. The clerk subtracts the tot
Arada [10]

Answer: <u>C. 20-.40p</u>

Step-by-step explanation:

We know that from the given information that each pound is worth 40 cents, and that its being subtracted from the twenty dollar bill.  

"Why are the others choices wrong?"

A. p-20, isn't the proper equation due to the stated information.

B. B. 20 -40p, this equation has Zelma pay $40 dollars each pound, which isn't correct due to what the text has stated ("for 40 cents per pound").

D. 40p-20, from the given text, this equation is wrong ("She pays the clerk with a twenty-dollar bill), it never states that she will be charged twenty dollars, or be given forty for each pound.

Another person who asked the same question:

brainly.com/question/9419974

8 0
2 years ago
helppppPPPppppPPppppppPppppPPpppPPPPpppPPPpppPppppPPPpPPPpppp please help do not look this up thank you
zhannawk [14.2K]

Answer:

Part A:

The probability of hitting the black circle is the ratio between the area of the black circle and the white square (including the black circle)

Area of circle:

Ac = pi x r^2 = pi x (2/2)^2 = pi (diameter = 2)

Area of square:

As = side^2 = 11^2 = 121 (side = 11)

=> P = pi/121 = ~0.025 (P = 0.025 < 0.5 => P is closer to 0 than 1)

Part B:

The probability of hitting the white portion could be calculated in a similar way as shown in part A. However, the event of hitting the white portion is the complement event of the event of hitting the black circle.

Because P(event) + P(complement of event) = 1

=> P = 1 - 0.025 = 0. 975 (P = 0.975 > 0.5 => P is closer to 1 than 0)

4 0
3 years ago
Three ratios that are equivalent to 7:6
NemiM [27]

Answer:

14:12

28:24

35:30

Step-by-step explanation:

I hope this helped

8 0
3 years ago
What is the area of a triange that has a base of 30 meters and a height of 12 meters? <br><br>​
liq [111]

1/2 *30*12=180

The area of the triangle is 180 meters squared

Hope this helped!

7 0
3 years ago
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