Mathematics, 03.10.2021 05:00 jazzy4211
At a school with 100 students, 37 were taking Arabic, 34 Bulgarian, and 30
Chinese. 19 students take only Arabic, 17 take only Bulgarian, and 12 take
only Chinese. In addition, 13 are taking both Arabic and Bulgarian, some of
whom also take Chinese. How many students are taking all three languages?
None of these three languages?
...
students are taking all three languages.
students are taking none of the three languages.
Answers: 1
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
Mathematics, 22.06.2019 00:20
Given: jk ||lm prove: _2 = 27 statement justification 1. jk ||lm 1. given 2.26 = 27 3.22 = 26 2. 3. 4. _2 = 27 4. corresponding angles theorem transitive property of equality vertical angles theorem substitution property of equality
Answers: 1
At a school with 100 students, 37 were taking Arabic, 34 Bulgarian, and 30
Chinese. 19 students ta...
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