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4 years ago

PLEASE ANSWER THIS QUICKLY! THANK YOU!

Mathematics

1 answer:

Citrus2011 [14]4 years ago

3 0

1/2 / 3/4
= 1/2 x 4/3
= 4/6
= 2/3

a = 2
b = 4
c = 3
d = 2
e = 3

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$\displaystyle -\frac{5}{12} + 1 = \frac{7}{12}$

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3 years ago

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4 years ago

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3 years ago

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3 years ago

A drunk person is walking on the road. With probability 0.6 he takes a step forward and with probability 0.4 he takes a step bac

Molodets [167]

If a person after 10 steps is at his starting position, then this person takes 5 steps forward and 5 steps backward.

This is a binomial distribution with

probability to take step forward $p=0.6;$
probability to take step backward $q=0.4;$
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Then

$Pr(\text{5 steps forward and 5 steps backward})=C_{10}^5p^5q^5=\\ \\=\dfrac{10!}{5!(10-5)!}\cdot (0.6)^5\cdot (0.4)^5=\dfrac{10!}{5!\cdot 5!}\cdot (0.6\cdot 0.4)^5=\\ \\=\dfrac{5!\cdot 6\cdot 7\cdot 8\cdot 9\cdot 10}{5!\cdot 2\cdot 3\cdot 4\cdot 5}\cdot (0.24)^5=7\cdot2\cdot 9\cdot 2\cdot (0.24)^5=252\cdot (0.24)^5=0.2006581248.$

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3 years ago