11. Indexing and cross-indexing may be made by using * A. Numbers B. Alphabet C. Combination of numbers and alphabet D. Numbers or the alphabet or the combination of both E. None of them

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A: Image is attached with detailed solution.

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A:

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A: Find the missing number.

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A: HERE AS PER GUIDELINES I HAVE CALCULATED FIRST MAIN QUESTION  here use counting principle

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A:

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A: COMBINATION

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A: Solution

Q: how many arrangements of the letters from the word COUNTING begin with a vowel

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A:

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Q: Who is the first black president of South Africa

A: The first black president of South Africa

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Q: Number Pattern .10, .05, .55, .275, .775, 3, 8, 3, 8, 3, . —— * 10, 40, 36, 144, 140, 560, *

A:

Q: 1. List 4 numbers between -1 and 1

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