Mathematics, 27.10.2019 00:43 soccerplayer17
To get ready for the piano recital miguel has been practicing seven days a week. each day he practices chords for 20 minutes interludes for 15 minutes and his recital piece a beethoven concerto for 40 minutes. what is the total amount of time miguel practices piano in a week
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Mathematics, 21.06.2019 23:00
Why is it so easy to buy on impulse and overspend with a credit card? what could you do to counteract this tendency?
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Mathematics, 21.06.2019 23:30
Aprisoner is trapped in a cell containing three doors. the first door leads to a tunnel that returns him to his cell after two days of travel. the second leads to a tunnel that returns him to his cell after three days of travel. the third door leads immediately to freedom. (a) assuming that the prisoner will always select doors 1, 2 and 3 with probabili- ties 0.5,0.3,0.2 (respectively), what is the expected number of days until he reaches freedom? (b) assuming that the prisoner is always equally likely to choose among those doors that he has not used, what is the expected number of days until he reaches freedom? (in this version, if the prisoner initially tries door 1, for example, then when he returns to the cell, he will now select only from doors 2 and 3.) (c) for parts (a) and (b), find the variance of the number of days until the prisoner reaches freedom. hint for part (b): define ni to be the number of additional days the prisoner spends after initially choosing door i and returning to his cell.
Answers: 1
To get ready for the piano recital miguel has been practicing seven days a week. each day he practic...
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