Recent content by ilvpat

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    Probability problem of pairing up siblings

    When you say Xi is 1 if sibling is member of a pair, do you mean a pair of opposite sex? And does it mean both bro and sis in ith pair got assigned to another pair of opposite sex?
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    Probability problem of pairing up siblings

    Homework Statement There are 10 sister/brother pairs, (S1,B1) ... , (S10,B10). We then divide the 20 people randomly into 10 (not necessarily female/male) pairs. Let X be the number of female/male pairs. Find E(X) Let Y be the number of pairs consisting of siblings (that is, sister got...
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    Engineering Careers in materials science & engineering

    Hi All, Could someone share their opinions and analysis on the future trends of engineering industries, such as the growing potential, job demands and salary competitiveness of different engineering fields? (EE, ME, CE, AE, SE) If you could, please be specific to the sub-discipline. (Example...
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    What Are the Key Factors Influencing Career Choices in Mechanical Engineering?

    Hi, Excuse me for not putting this post on Academic Advise. I am a mechanical engineering student and therefore would like to target my question to the general ME audience who might have a better understanding of the field. I see myself as being an engineer working in the industry after my...
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    How Many Ladies Had All Four Items at the Church Fete?

    I see now. The way I interpreted the problem leads me to the wrong direction. I was looking for a unique solution rather than a bound. Thanks guys!
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    How Many Ladies Had All Four Items at the Church Fete?

    Q: Out of 100 ladies attending the church fete, 85 had a white handbag; 75 had black shoes; 60 carried an umbrella; 90 wore a ring, How many ladies must have had all four items? I feel like the problem is under-determined. But if anybody can explain it to me it would be great. Thank you...
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