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#### Petrus

##### Well-known member

- Feb 21, 2013

- 739

I got difficult understand this kind of questions, anyone got any tips or could explain, cause I find it really hard to understand when I do this kind of problem, this is an old problem from exam that I hopefully did translate well.

A priest needs to choose six hymns for Sunday's show. Hen has three hymnbooks, each with 25

hymns (thus 75 different hymns together). In how many ways can hen choose the hymns of

(a) all the hymns to choose from the same book?

(b) hen would choose two from each of the books?

(c) hen want at least a hymn from each book?

Note. that the order of the psalms has no significance.

Regards,

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