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3 years ago

There is a 20% chance of thunderstorms tomorrow. Describe the likelihood of the event.

Mathematics

2 answers:

Pachacha [2.7K]3 years ago

8 0

Answer:

Step-by-step explanation:

20% = 1/5 or 0.2

There is a 1/5 chance of a thunderstorm.

There really is no clear answer. I would try 0.2

labwork [276]3 years ago

7 0

Answer: The vent is unlikely to happen.

Step-by-step explanation:

Given : There is a 20% chance of thunderstorms tomorrow.

i.e. the probability of thunderstorms tomorrow =0.2

We know that when the probability of any event lies between 0 and 0.5 then the event is said to be unlikely to happen.

Since , the probability of thunderstorms tomorrow is between 0 and 0.5.

Therefore, it is unlikely to have thunderstorms tomorrow.

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How to factor out 7x^6

Nataly_w [17]

Answer:

Step-by-step explanation:

so you do 7 times 6 and you should get 42

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3 years ago

A coin, having probability p of landing heads, is continually flipped until at least one head and one tail have been flipped. (a

Natali [406]

Answer:

(a)

The probability that you stop at the fifth flip would be

$p^4 (1-p) + (1-p)^4 p$

(b)

The expected numbers of flips needed would be

$\sum\limits_{n=1}^{\infty} n p(1-p)^{n-1} = 1/p$

Therefore, suppose that $p = 0.5$ , then the expected number of flips needed would be 1/0.5 = 2.

Step-by-step explanation:

(a)

Case 1

Imagine that you throw your coin and you get only heads, then you would stop when you get the first tail. So the probability that you stop at the fifth flip would be

$p^4 (1-p)$

Case 2

Imagine that you throw your coin and you get only tails, then you would stop when you get the first head. So the probability that you stop at the fifth flip would be

$(1-p)^4p$

Therefore the probability that you stop at the fifth flip would be

$p^4 (1-p) + (1-p)^4 p$

(b)

The expected numbers of flips needed would be

$\sum\limits_{n=1}^{\infty} n p(1-p)^{n-1} = 1/p$

Therefore, suppose that $p = 0.5$ , then the expected number of flips needed would be 1/0.5 = 2.

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3 years ago

The expression (x^22) (x^7)^3 is equivalent to x^p. What is the value of p?

SpyIntel [72]

Answer:

x^87

Step-by-step explanation:

Multiplying x^22 and x^7 results in x^29.

Then we have:

(x^29)^3 = x^87

Recall that (a^b)^c = a^(bc) and that a^b*a^c = a^(b + c)

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3 years ago

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Answer:

-2 - 5 = -7

Step-by-step explanation:

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2 years ago

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