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4 years ago

16/4-12/3= I need help!!!

Mathematics

2 answers:

crimeas [40]4 years ago

6 0

the answer is Zero

four minus four equals zero

Vlada [557]4 years ago

3 0

Change the fractions to have like denominators. 16/4 - 12/3 is the same as 48/12 - 48/12 which equals 0. You could also simplify the original fractions and then subtract. 16/4 is 4 and 12/3 is 4 → 4 - 4 = 0

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tangare [24]

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2 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

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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

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3 years ago

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Eva8 [605]

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3 years ago

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vlada-n [284]

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4 years ago