Probability that the third child selected will be a girl
A kindergarten class consists of 14 boys and 11 girls If the teacher selects a random sample of n = 3 children and the first two children are both boys, what is the probability that the third child selected will be a girl? Explain your response.
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Changes in kinetic and potential energies are negligible. Calculate the heat transfer per kilogram of nitrogen flowing through the heater. Assume that nitrogen behaves as an ideal gas.
A 0.45 M solution of pentanoic acid (CH3CH2CH2CH2COOH) is found tohave a pH of 3.73 at 298K. What is the value of the acid dissociation constant Ka for this monoprotic acid?
During the process, the pressure and specific volume are related by Pv=constant and the work has a magnitude of 32 kJ. Sketch the process on P-v diagram. Determine the heat transfer, in kJ.
A compound is 10.2% C4 (by mass). Theother 89.8% is Cl. When 23.6 of it is dissolved in 500g of camphor,the freezing point is depressed from 179.8oC to171.8oC.
Many cigarette lighters contain liquid butane,C4H10(l). Using standard enthalpies of formation, calculate the quantity of heat produced when3.3 g of butane is completely combusted in air under standard conditions.
For a normal distribution, identify the z-score location that would separate the distribution into two sections so that there is 70% in the body on the right-hand side.
Find the actual percentages of observations within one, two , and three standard deviations of the mean?
For a normal distribution, identify the z-score location that would separate the distribution into two sections so that there is 80% in the body on the right-hand side.
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