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3 years ago

9x-(6×-1)=2 solve using addition and multiplication

Mathematics

1 answer:

ira [324]3 years ago

3 0

Answer:

0.2

Step-by-step explanation:

you move 9x to make 6x-1=2-9x

then move the 1 to make 6x=3-9x

so this means that 15x=3

so x=0.2

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Neko [114]

Answer:

The probability is 0.0008.

Step-by-step explanation:

Let X represents the event of defective bulb,

Given, the probability of defective bulb, p = 20 % = 0.2,

So, the probability that bulb is not defective, q = 1 - p = 0.8,

The number of bulbs drawn, n = 10,

Since, binomial distribution formula,

$P(x=r) = ^nC_r p^r q^{n-r}$

Where, $^nC_r = \frac{n!}{r!(n-r)!}$

Hence, the probability that exactly 7 bulbs from the sample are defective is,

$P(X=7)=^{10}C_7 (0.2)^7 (0.8)^{10-7}$

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3 years ago

9x-(6×-1)=2 solve using addition and multiplication ​

9x-(6×-1)=2 solve using addition and multiplication