Let x and y each be random real numbers chosen from the uniform interval (0,1). Call the product of these numbers z.
1) Find the probability that z is in the interval (.1,.2)
2) Find the probability that z is any decimal whose first digit when written in scientific notation is a 1.
Bonus) Find the full probability distribution of the first digit of z.
Note: Give all answers as exact numbers in closed form.
(1) .1916290732
(2) .2413481689
(3)The required probability distribution is as follows:
1 + d * ln(d) - (d+1) * ln(d+1)) / 9 + 10 * ln(10) / 81
Edited on February 23, 2024, 11:58 pm