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asambeis [7]
2 years ago
11

There are 10 boys and 10 girls. What is the probability that 2 boys will be chosen

Mathematics
2 answers:
stealth61 [152]2 years ago
8 0

Answer:

about 24%

Step-by-step explanation:

1/2 times 9/19

0.5 times 9/19

is about 0.24

0.25 mean about 24%

Aliun [14]2 years ago
6 0

Answer:

Approximately 24%.

Step-by-step explanation:

There are _{10}C_2=45 ways of choosing two boys and _{20}C_2=190 ways of choosing two kids (boys or girls). So the probability of getting two boys is 45/190=0.23684210526.

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What word describes the equal shares of the shape
nexus9112 [7]
The word that describes it is congruent
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3 years ago
Suppose lightning strikes at an average of 1.4 strikes per minute during a particular storm. You play the following game: if the
ZanzabumX [31]

Answer:

$3.25

Step-by-step explanation:

Given that:

Mean, λ = 1.4

Strike within next minute = $3 won

Strike between one and 2 minutes = $5

Strike more than 2 minutes = $1

Probability that next strike occurs within the next minute :

Using poisson :

P(x < 1) = 1 - e^-(λx) ;

P(x < 1) = 1 - e^-(1.4*1) = 1 - e^-1.4

P(x < 1) = 1 - 0.2465969

P(x < 1) = 0.7534030

Next strike occurs between 1 and 2 minutes :

(1 < x < 2) :

P(x < 2) - P(x < 1)

P(x < 2) = 1 - e^-(λx) ;

P(x < 2) = 1 - e^-(1.4*2) = 1 - e^-2.8

P(x < 2) = 1 - 0.0608100

P(x < 2) = 0.9391899

P(x < 2) - P(x < 1)

0.9391899 - 0.7534030 = 0.1857869

P(striking after 2 minutes)

P(x > 2) = e^-(λx) ;

P(x > 2) = e^-(1.4*2) = e^-2.8

P(x > 2) = 0.0608100

Amount charged :

(0.7534030 * 3) + (0.1857869 * 5) + (0.06081 * 1)

= 3.2499

= $3.25

4 0
3 years ago
I need help on all the questions here
Slav-nsk [51]
They all are all math vocabulary
4 0
3 years ago
Read 2 more answers
Jason has $2.25 worth of dimes and quarters he has twice as many dimes as quarters determine the number of dimes and the number
iris [78.8K]

Answer: jason has 10 dimes and 5 quarters.

Step-by-step explanation:

The worth of a dime is 10 cents. Converting to dollars, it becomes

10/100 = $0.1

The worth of a quarter is 25 cents. Converting to dollars, it becomes

25/100 = $0.25

Let x represent the number of dimes that he has.

Let y represent the number of quarters that he has.

He has twice as many dimes as quarters. This means that

x = 2y

Jason has $2.25 worth of dimes and quarters. This means that

0.1x + 0.25y = 2.25 - - - - - - - - - - - 1

Substituting x = 2y into equation 1, it becomes

0.1 × 2y + 0.25y = 2.25

0.2y + 0.25y = 2.25

0.45y = 2.25

y = 2.25/0.45

y = 5

x = 2y = 2 × 5

x = 10

6 0
3 years ago
1.<br> A line that passes through coordinates (2,8) and (1, 3)
Vlad1618 [11]

Answer:

The answer to your question should be -5/1(i might be wrong)

Step-by-step explanation:

y2-y1

x2-x1

7 0
3 years ago
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