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A book shelf contains 3 Russian novels, 4 German novels, and 5 Spanish novels. In how...

A book shelf contains 3 Russian novels, 4 German novels, and 5 Spanish novels. In how many we can arrange the books if
a. there are no constraints as to grouping?
b. all the Spanish novels must be together?
c. no two Spanish novels are next to one another?

Math   Statistics-And-Probability   
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