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olga nikolaevna [1]
3 years ago
8

You flip a coin twice. What is the probability it lands heads-up both times?

Mathematics
2 answers:
svetlana [45]3 years ago
6 0

Answer:

$\frac{1}{4}

Step-by-step explanation:

Each time you a flip a coin, there is a \frac{1}{2} chance it lands on heads. Therefore, after flipping a coin twice, the probability that it lands on heads both times is:

\frac{1}{2}\cdot \frac{1}{2}=\boxed{\frac{1}{4}}

harina [27]3 years ago
3 0

Answer: 1/4

Step-by-step explanation: 1/2 chance it shows heads if you do it once so: 1/2 times 1/2

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In a survey of a community, it was found that 85% of the people like winter season and 65% like summer season. If none of them d
KengaRu [80]

Answer:

50%

Step-by-step explanation:

Let :

Winter = W

Summer = S

P(W) = 0.85

P(S) = 0.65

Recall:

P(W u S) = p(W) + p(S) - p(W n S)

Since, none of them did not like both seasons, P(W u S) = 1

Hence,

1 = 0.85 + 0.65 - p(both)

p(both) = 0.85 + 0.65 - 1

p(both) = 1.50 - 1

p(both) = 0.5

Hence percentage who like both = 0.5 * 100% = 50%

6 0
3 years ago
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Bess [88]
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3 0
2 years ago
What is the domain of f/g given f(x) = x+4 and g(x) = x-1
Butoxors [25]

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Step-by-step explanation:

since f(x) = x + 4 and g(x) = x -  1

then f/g = x + 4/x - 1

the denominator of a function cannot be zero since a fraction with a denominator of zero is undefined.

∴  x - 1 ≠ 0

the value of x when g(x) = 0 is

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∴ x ≠ 1

Therefore the domain of f/g is every real number except 1 which can be conventionally expressed as {(x,y): <em>x</em> ∈ R, x ≠ 1} OR (-∞ ≤ x < 1) ∩ (1< x ≤ ∞) OR x ∈ R; x ≠ 1.

5 0
3 years ago
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Answer:

see below

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