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3 years ago

10

the freezing point of water is 32 degrees F. Tim added potassium and found out that the freezing point went down by 8 degrees F.

what is the freezing point of the water with the added potassium?

1 answer:

ycow [4]3 years ago

5 0

If water freezing point is 32 F and water and potassium went down 8 degrees F then it is 24 degrees F is the freezing point for water and potassium

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Alja [10]

Answer:

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Step-by-step explanation:

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and probability of none defective as probability of failure = q

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$\begin{gathered} P_x=^4C_2\times\lparen\frac{1}{6})^2\times\lparen\frac{5}{6})^{4-2} \\ P_x=6\times\frac{1}{36}\times\frac{25}{36} \\ P_x=\frac{25}{216} \\ =0.1157 \end{gathered}$

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$\begin{gathered} \lparen\frac{5}{6})^4=\frac{625}{1296} \\ =0.4823 \end{gathered}$

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$\begin{gathered} \lparen\frac{1}{6})^4=\frac{1}{1296} \\ =0.00077 \end{gathered}$

(iv) At least one is defective

This is 1 - probability that none is defective

$\begin{gathered} 1-\lparen\frac{5}{6})^4 \\ =1-\frac{625}{1296} \\ =\frac{671}{1296} \\ =0.5177 \end{gathered}$

Hence the answer is 0.5177

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