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Dovator
3 months ago
7

Three people toss a fair coin and the odd one pays for coffee. if the coins all turn up the same, they are tossed again. find th

e probability that fewer than 4 tosses are needed.
Mathematics
1 answer:
lawyer [12.5K]3 months ago
8 0

In the absence of a specific question posed, below are the potential inquiries along with their respective answers:

P(fewer than 4 tosses)
= P(one toss) + P(two tosses) + P(three tosses)
= (3/4) + (3/4)(1/4) + (3/4)(1/4)^2
= 0.984375


Expected value
= 1 / p
= 1 / (3/4)
= 4 / 3

Variance
= (1 - p) / p^2
= (1 - (3/4)) / (3/4)^2
= (1/4) / (9/16)
= 4 / 9

Standard deviation
= sqrt(Variance)
= sqrt(4 / 9)
= 2 / 3

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2 months ago
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Find the coefficient of x2 in (3x2 – 5) (4 + 4x2), expand using algebraic expressions and answer
babunello [11817]

Answer:

- 8

Step-by-step explanation:

Given the expression

(3x² - 5)(4 + 4x²)

Each term from the second factor is multiplied by every term in the first factor, meaning

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7 0
3 months ago
The height of a cylinder is twice the radius of its base. A cylinder has a height of 2 x and a radius of x. What expression repr
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