# Discrete random variables

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?

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.

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