48. A student made the following statements regarding the expansion of (a + b)* written in descending powers of a. Statement 1: The total number of terms is 5. Statement 2: The sum of the coefficients of all terms is 14. Statement 3: For the term 4a³bm, the value of m is 1. 4! Statement 4: The coefficient of the first term is 1!x(4-1)!" Which of the following statement/s is/are true? A. Statement 1 B. Statements 1 and 4 C. Statements 1, 2 and 3 D. Statements 1 and 3 only

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A: Explanation and solutions is given below....

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A: It is an important part of statistics. It is widely used.

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Q: How many elements does it contain?  I forgot to add that part.

A: From the above part we haven(C) = n(B) ={ (1,4),(4,1),(2,3),(3,2) }n(CB) = { (2,3),(3,2) }

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A: According to the given information, it is required to verify that the indicated function is a…