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Varvara68 [4.7K]
3 years ago
10

sadie travels through two intersections with traffic lights as she drives to work. The traffic lights operate inependently. The

probability that both lights will be red when she reaches them is 0.22. The probability that the first light will be rerd and the second light will not be red is 0.33. what is the probability that the second light will be red when she reaches it
Mathematics
1 answer:
Mariana [72]3 years ago
6 0

Answer:

The probability that the second light will be red when she reaches it is 0.4

Step-by-step explanation:

Given the two events are independent

Hence, the probability of both the red light is (P1) * (P2) = 0.22

The probability of first light being red = probability of both the intersections to have red light + probability that the first light will be rerd and the second light will not be red

probability of first light being red =  0.22 + 0.33 = 0.55

(P1) * (P2) = 0.22

Substituting the given values, we get -

0.55 * P2 = 0.22

P2 = 0.4

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The population of a town increased by 15% in 2016, and decreased by 5% in 2017. If the population of the town was 60,000 in the
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Answer:

The population of the town at the end of 2017 was 65,550.

Step-by-step explanation:

The population of the town was 60,000 in the beginning of 2016.

In 2016, the total population is increased by 15%.

60,000\times\frac{15}{100}=9000

Therefore the population is increased by 9000 and the population of the town at the end of 2016 was

60,000+9000=69,000

In 2017, the total population is decreased by 5%.

69,000\times\frac{5}{100}=3450

Therefore the population is decreased by 3450 and the population of the town at the end of 2017 was

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3 years ago
Find the theoretical probability.<br> Simplify completely.
mart [117]
Answer: 1/2

Explanation:

There are 8 number in the set

And 4 of them are even

We can write it
P(even) = 4/8 = 1/2
6 0
3 years ago
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Find the length of the legs of a right triangle if the legs are the same length and
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2 years ago
What is the solution of |-1 + x| = 5
nataly862011 [7]

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6, -4

Step-by-step explanation:

abs(-1+x)=5

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-------------------------

-1+x=5

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-------------------

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4 0
3 years ago
46:34
Mashcka [7]

Answer:

The first 2

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The others would lead to a negative number.

Remember negative times negative = positive

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3 years ago
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