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Tpy6a [65]
3 years ago
13

Simplify 2(x-3)÷4=5-8+5

Mathematics
1 answer:
goldfiish [28.3K]3 years ago
6 0
2(x-3)÷4=5-8+5
(x-3)/2 = -3 + 5
x - 3 = -6+ 10
x = 4 + 3
x = 7

first,we need to eliminate the fraction by simply it with 2.After that,bring 2 to the right hand side and multiply it.Solve untill u get value of x.
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Step-by-step explanation:

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A scientist inoculates​ mice, one at a​ time, with a disease germ until he finds 3 that have contracted the disease. If the prob
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Answer:

The probability that 8 mice are​ required is 0.2428.

Step-by-step explanation:

Given : A scientist inoculates​ mice, one at a​ time, with a disease germ until he finds 3 that have contracted the disease. If the probability of contracting the disease is two sevenths.

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Applying binomial distribution,

P(X=r)=^nC_r p^rq^{n-r}

Where, p is the probability of success p=\frac{2}{7}

q is the probability of failure q=1-p, q=1-\frac{2}{7}=\frac{5}{7}

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Substitute the values,

P(X=3)=^8C_3 (\frac{2}{7})^3 (\frac{5}{7})^{8-3}

P(X=3)=\frac{8!}{3!5!}\times \frac{8}{343}\times (\frac{5}{7})^{5}

P(X=3)=\frac{8\times 7\times 6}{3\times 2\times 1}\times \frac{8}{343}\times \frac{3125}{16807}

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Answer:

That is correct.

Step-by-step explanation:

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8 times 0.01=0.08

20+4+0.5+0.08=24.58

That is correct.

5 0
3 years ago
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