Mathematics, 13.02.2020 18:13, sarath30
Three molecules of type A, three of type B, three of type C, and three of type D are to be linked together to form a chain molecule. One such chain molecule is ABCDABCDABCD, and another is BCDDAAABDBCC.
a.) How many such chain molecules are there?
[Hint: If the three A's were distinguishable from one another --A[1], A[2], A[3] and the B's and C's and D's were also how many molecules would be there be? How is the number reduced when the subscripts are removed from the A's?
B) Suppose a chain molecule of the type described is randomly selected. What is the probability that all three molecules of each type end up next to one another (such as in BBBAAADDDCCC)?
Answers: 3
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Mathematics, 22.06.2019 01:30, maymuu4life
As a self-employed seamstress, you know that it takes 7 yards of material to make 3 jackets. you bought 15 yards of material to make 7 jackets. did you buy enough material? if not, how much were you over or under?
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(fog)(x) if f(x)=x^2- 4 and g(x)=x^2 + 2 x, f(g(x))= f(x^2+2x) (x^2+2x)^2-4 (x^2+2x)(x^2+2x)-4 (x^4+2x^3+5x+4x^2)-4 x^4+2x^3+4x^2+5x-4 what am i doing wrong
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