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# Discrete random variables

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Thirty per cent of patients undergoing particular diagnostic procedure require a sedative. In a random sample of ten patients undergoing this procedure, what is the probability that
1. At least half will require a sedative?
2. Fewer than 3 will require a sedative?
3. At least 9 will not require a sedative?

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https://brainmass.com/statistics/probability/discrete-random-variables-212334

## SOLUTION This solution is FREE courtesy of BrainMass!

Please see the attached file.

The heat of fusion of ice C1=335 J/K
The temperature of ice =273K
Mass of ice =100gm

The heat capacity of water C2=335 J/K
The temperature of water T2=273K
Mass of water =100gm
After mixing Let T be the temperature of the mixture.

Then

From it by substituting the values temperature of the mixture
335(T-273)=4.18(335-T)
T=273.76 K
The change in entropy =

=100X0.0875=8.75J/Kgm

Please check the numerical value of the last result.

This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

© BrainMass Inc. brainmass.com October 5, 2022, 1:25 am ad1c9bdddf>
https://brainmass.com/statistics/probability/discrete-random-variables-212334