Suppose that 75% of students attend lectures for a particular course and 20% of students fall the exam. If 60% of students both attend lectures and pass the exam, what is the percentage who do not attend lectures but still pass the exam? [Enter your answer as an integer without the percentage sign.]

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LUP Decomposition

LU decomposition stands for Lower-Upper decomposition. LU decomposition is the factorization of the lower triangular matrix and an upper triangular matrix. It is very useful in linear algebra and numerical analysis. A permutation matrix is usually included in the product. Gaussian elimination in a matrix form is known as LU decomposition, When inverting a matrix or evaluating its determinant, this is a crucial step. Tadeusz Banachiewicz, a Polish mathematician, first proposed the LU decomposition in 1938.