Mathematics, 08.12.2020 05:30 lilmsnyah

A book shelf displays different types of books, 6 books in English (E) and 5 books in Spanish (S). If 4 books are chosen among the English language books and 3 are selected from the Spanish language books, calculate how many ways can the 7 books be arranged on a shelf given that, i) There are no restrictions (no concern on the sequence)?
ii) 4 English books must put together?
iii) English and Spanish books must put in alternate way (i. e. ESESESE).

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