I need help asap

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9. Solve for n. a) nP3 = 120 b ) 3(nC2) = 12(nC1) 5 10. Expand (y - yz) using the binomial theorem. Simplify your answer. 11. How many ways can all the letters of a Loha be arranged if a) The 'a's must be together? b ) The 'a's cannot be together? C) Each arrangement must begin with a vowel and the consonants cannot be together