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GalinKa [24]
3 years ago
6

during a 5-year period, 56% of snowstorms in a certain city caused power outages. Thirty-three of the snowstorms did not cause p

ower outages. find the total number of snowstorms in this city over the 5-year period
Mathematics
1 answer:
serg [7]3 years ago
3 0
44% of storms didn't cause outages

44% = 33

33/44 = 0.75    Each percentage represents 0.75 storms

0.75 x 100 = 75     Total number of storms
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mihalych1998 [28]

Answer:

0.1333 = 13.33% probability that bridge B was used.

Step-by-step explanation:

Conditional Probability

We use the conditional probability formula to solve this question. It is

P(B|A) = \frac{P(A \cap B)}{P(A)}

In which

P(B|A) is the probability of event B happening, given that A happened.

P(A \cap B) is the probability of both A and B happening.

P(A) is the probability of A happening.

In this question:

Event A: Arrives home by 6 pm

Event B: Bridge B used.

Probability of arriving home by 6 pm:

75% of 1/3(Bridge A)

60% of 1/6(Bridge B)

80% of 1/2(Bridge C)

So

P(A) = 0.75*\frac{1}{3} + 0.6*\frac{1}{6} + 0.8*\frac{1}{2} = 0.75

Probability of arriving home by 6 pm using Bridge B:

60% of 1/6. So

P(A \cap B) = 0.6*\frac{1}{6} = 0.1

Find the probability that bridge B was used.

P(B|A) = \frac{P(A \cap B)}{P(A)} = \frac{0.1}{0.75} = 0.1333

0.1333 = 13.33% probability that bridge B was used.

8 0
3 years ago
What’s the answer? <br> Idk what it is
Aleks [24]

Answer:

B -9/7

Step-by-step explanation:

We need to find a number between

-3 1/3 < x < -4/5

We want a number smaller than between -3 1/3 and -.8

Looking at the choices

-9/7 = - (7/7 + 2/7) = -(1+2/7) = -1 2/7

That is between -3 1/3 and  -4/5

8 0
4 years ago
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Leto [7]
Hey there
That's easy
Divide 2750 by 40 and a good estimate would be 68 dollars
Hope this helps
7 0
3 years ago
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Mariana [72]
You put the whole number over 1 then multiply so both fractions have the same denominator.
Example:
2- 1/2

2/1 -1/2

4/2 - 1/2 = 3/2 = 1 1/2

I’m not sure if this helped but I hope it did
6 0
3 years ago
Prove angle FGH is congruent to angle HIF.
Rom4ik [11]

Answer: someone please answer :(((

Step-by-step explanation:

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