3 years ago

I ready probability concepts quiz

Mathematics

1 answer:

Flura [38]3 years ago

8 0

Attack the problem first

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A door alarm works in 72 out of 100 cases and surveillance camera works in 68 out of 100 cases. what is the probability of effec

Rudiy27

A door alarm works in 72 out of 100 cases.

surveillance camera works in 68 out of 100 cases.

The probability that method A is used = 72/100

The probability that method B is used = 68/100

Since both method are used we find the probability of A and B

Probability ( A and B) = $\frac{72}{100}$ * $\frac{68}{100}$

= $\frac{306}{625}$

7 0

3 years ago

Read 2 more answers

How many different ways can you find for 7 coins totaling 95 cents?

MatroZZZ [7]

Answer:

one way

Step-by-step explanation:

2 quarters

4 dimes

1 nickel

3 0

3 years ago

What is the area of this composite figure?

Mkey [24]

We have two congruent trapezoids.

The formula of an area of a trapezoid:

$A=\dfrac{base_1+base_2}{2}\cdot\ height$

We have:

$base_1=210\ mm\\\\base_2=150\ mm\\\\height=55\ mm$

Substitute:

$A=\dfrac{210+150}{2}\cdot55=\dfrac{360}{2}\cdot55=180\cdot55=9,900\ mm^2$

Answer:

$2A=2\cdot9,900\ mm^2=19,800\ mm^2$

6 0

3 years ago

Ricardo purchased a new car with special 1.9% financing. If the cars price was 17,999 and he financed it for years, find his mon

frosja888 [35]

Answer:

the answer is actually $389.71

Step-by-step explanation:

4 0

3 years ago

Explain how to simplify this complex fraction. 330pages/3/4hour.

meriva

Answer:
= 330/1 ÷ 3/4

= (330 × 4) / (3 × 1)

= 1320/3

= 440/1

<span>= 440

Hope this helps! </span>

7 0

3 years ago