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Licemer1 [7]
3 years ago
7

Each number from 1 through 20 is written on a separate index card and placed inside a box. Which fraction in simplest form repre

sents the probability that an index card with a number greater than 12 is chosen on the first attempt?
a
1/20
b
2/5
c
9/20
d
3/5
Mathematics
2 answers:
aivan3 [116]3 years ago
6 0

Answer:

The answer would be B 2/5

Step-by-step explanation:

mamaluj [8]3 years ago
3 0

Answer:

since there are 8 chances that it will be greater than 12 u have to find out what percent 8 is of 20 that would make the probability 40 % then u convert 40%to a fraction and simplfy it which would make ur answer 2/5 so answer )b

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What is the arithmetic mean of the first million odd numbers
balandron [24]
It's 1,000,000: 

<span>the sum is 1 + 3 + 5 + ... 1999999 </span>

<span>= 1 + 2 + ... + 2000000 - 2*(1 + ... + 1000000) </span>

<span>= 2000000*2000001/2 - 2*(1000000*1000001 / 2) </span>

<span>= 1000000*(2000001 - 1000001) = 1000000000000 (one million million) </span>

<span>and dividing this by one million to get the average, </span>

<span>you get one million</span>
8 0
4 years ago
jared wants to paint his room. the dimensions of the room. are 12 by 15 feet and the walls 9 feet. there are two Windows, each w
astra-53 [7]
I'm going to say 3 1\2. Let me know when you get the answer.
8 0
4 years ago
Read 2 more answers
Jake buys a fruit smoothie and a protein bar for​ $5.90. Kobe buys 2 fruit smoothies and 4 protein bars. He pays​ $16.80. What i
Andrei [34K]

Answer:

Fruit smoothie: $3.4

Protein bar: $2.5

Step-by-step explanation:

Let x represent cost of fruit smoothie and y represent cost of protein bar.

We have been given that Jake buys a fruit smoothie and a protein bar for​ $5.90. We can represent this information in an equation as:

x+y=5.90...(1)

x=5.90-y...(1)

We are also told that Kobe buys 2 fruit smoothies and 4 protein bars. He pays​ $16.80. We can represent this information in an equation as:

2x+4y=16.80...(2)

Upon substituting equation (1) in equation (2), we will get:

2(5.90-y)+4y=16.80

11.80-2y+4y=16.80

2y=16.80-11.80

2y=5

y=\frac{5}{2}=2.5

Therefore, each protein bar costs $2.5.

Upon substituting y=2.5 in equation (1), we will get:

x=5.90-2.5=3.4

Therefore, each fruit smoothie costs $3.4.

8 0
4 years ago
A turtle moves an an average speed of 12 inches/hour. How long does it take the turtle to travel 8 inches?
Korvikt [17]

Answer:

40 minutes

Step-by-step explanation:

We can solve this problem through finding the proportion...

Let the time taken to travel 8 inches at the speed be x

Hence, 12:60 :: 8:x

We must multiply the extremes and the nears..

Hence,

12x=60×8

x=60×8/12

x=40 minutes

7 0
3 years ago
Gorilla
harina [27]
The answer is true hopefully this helped
8 0
4 years ago
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