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2 years ago

Jess is trying to save $100. She saves money each week. The first week she saves

Mathematics

2 answers:

sweet [91]2 years ago

6 0

First of all add the money she saved in total and then subtract that from 100 to find the money remaining to save...

$\sf\to \: total \: money = 20.75 + 22.50 + 26.65 \\ \sf \to \: total \: money = 69.9$

<h3>Now, Subtract the sum from 100</h3>

$\tt \dashrightarrow \: 100 - 69.9$

$\tt \dashrightarrow \: 30.1$

<em>Thus, She need to save $30.1 more to complete her goal of 100...~</em>

Minchanka [31]2 years ago

5 0

Answer:

she needs to save more $30.1

Step-by-step explanation:

more does she need to save = $100 - $20.75 - $22.50 - $26.65 = $30.1

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Answer:

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Step-by-step explanation:

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The probability associated to a failure would be p =1-0.09 = 0.91

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Where (nCx) means combinatory and it's given by this formula:

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And we want to find this probability:

$P(x \geq 6)=P(X=6)+P(X=7)$

And we can find the individual probabilities:

$P(X=6)=(7C6)(0.91)^6 (1-0.91)^{7-6}=0.358$

$P(X=7)=(7C7)(0.91)^7 (1-0.91)^{7-7}=0.517$

And replacing we got:

$P(x \geq 6)=P(X=6)+P(X=7)= 0.358+0.517=0.875$

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