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2 years ago

I need help on one of my work sheet questions.

Mathematics

2 answers:

zmey [24]2 years ago

8 0

Step-by-step explanation:

there is your answers worked out step by step

Bas_tet [7]2 years ago

7 0

Answer:

0 $\leq$ x $\leq$ 18

Step-by-step explanation:

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12.what is the probability that a boy and a girl chosen randsomly will be seniors?

zhenek [66]

$\frac{\textbf{1}}{\textbf{20}}$

Step-by-step explanation:

Probability= $\frac{\text{number of favourable outcomes}}{\text{total number of outcomes}}$

Probability for a randomly chosen girl to be senior= $\frac{\text{number of senior girls}}{\text{total number of girls}}$

Probability for a randomly chosen girl to be senior= $\frac{7}{8+11+9+7}=\frac{7}{35}=\frac{1}{5}$

Probability for a randomly chosen boy to be senior= $\frac{\text{number of senior boys}}{\text{total number of boys}}$

Probability for a randomly chosen girl to be senior= $\frac{9}{10+7+10+9}=\frac{9}{36}=\frac{1}{4}$

For two independent events,

Probability for both event 1 and event 2 to take place= $\text{probability of event 1} \times \text{probability of event 2}$

Since choosing boys and girls is independent,

Probability for both boy an girl chosen to be senior= $\text{probability for boy to be senior}\times\text{probability for girl to be senior}$

Probability for both boy and girl chosen to be senior= $\frac{1}{5} \times \frac{1}{4} = \frac{1}{20}$

So,required probability is $\frac{1}{20}$

3 0

3 years ago

number between 1 and 10, inclusive, is randomly chosen. Events A and B are defined as follows. A: {The number is even} B: {The n

Rufina [12.5K]

Answer:

A U B = {1,2,3,4,5,6,8}

Step-by-step explanation:

Let's define the sets.

Let ¢ = universal set ( Contains all the elements in the set)

¢ = {1, 2, 3, 4, 5, 6, 7, 8, 9 , 10}

A= {2, 4, 6, 8}

B= {1,2,3,4,5,6}

Therefore: A U B (A union B):

A U B = {1, 2, 3, 4, 5, 6, 8}

6 0

3 years ago

Choose the more precise measurement from the pair 54.1 cm and 54.16 cm and justify your answer.

gayaneshka [121]

54.16, it's more specific

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2 years ago

PLEASE HELP ASAP!! I REALLY NEED HELP!

rewona [7]

The length is 37in. The width is 7in.

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2 years ago

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Which systems of equations has a solution of approximately (-2.7,-1.2)

olga2289 [7]

The appropriate choice is ...
1) 4x-5y=-5 and 3x+10y=-20

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2 years ago

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