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Directions(26-30): In these questions, relationship between different elements is shown in the statements. These statements are followed by two conclusions Give answer (1) if only conclusion I follows

The probability that a student knows the correct answer to a multiple choice question is 2/3. If the student does not know the answer, then the student guesses the answer. The probability of the guess

By solving algebraic expression 2(3m -4n +5) -3(2m -3n +4), answer should be

On solving algebraic expression -38b⁄2, answer will be

On solving expression 8c + 4d - c + 3d, answer will be

On solving expression 2x⁄5 + 3(2x -12)⁄2 + 2(5x + 8)⁄5, answer will be

On solving algebraic expression 2(x - 2y) +4(2y + 3z) -3(x + 4y - 5z), answer will be