
(a)
The probability of getting each of the 10 digits by picking one from the first 25 digits in the decimal expansion of
(a)

Answer to Problem 1.10P
The probability of getting each of the 10 digits are
Explanation of Solution
Write the expansion of
Write the expression for probability
Here,
Conclusion:
Substitute
Substitute
Substitute
Substitute
Substitute
Substitute
Substitute
Substitute
Substitute
Substitute
Therefore, the probability of getting each of the 10 digits are
(b)
The most probable digit, the median digit and the average value.
(b)

Answer to Problem 1.10P
The most probable digit is
Explanation of Solution
The most probable digit is the digit for which
The median is the value of
Write the expression for the average value.
Here,
Conclusion:
From part (b), write the expression for
From part (b), write the expression for
Expand the summation in equation (II) and substitute the corresponding values.
Therefore, the most probable digit is
(c)
The standard deviation of the given distribution.
(c)

Answer to Problem 1.10P
The standard deviation of the given distribution is
Explanation of Solution
Write the expression for the expectation value of
Here,
Write the expression for standard deviation
Here,
Conclusion:
Expand the summation in equation (II) and substitute the corresponding values
Substitute
Therefore, the standard deviation of the given distribution is
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Chapter 1 Solutions
Introduction To Quantum Mechanics
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