New SIDBI Grade A New Batch Starts on Nov 18

    Register

    Question

    All the sides of a 3-inch solid cube are painted. The cube is then cut into cubes of equal size to 1 inch each. If a cube is chosen at random, what is the probability that none of its sides are painted?

    A 1/3 Correct Answer Incorrect Answer
    B 1/27 Correct Answer Incorrect Answer
    C 1/9 Correct Answer Incorrect Answer
    D 1/2 Correct Answer Incorrect Answer

    Solution

    Side of cube = 3 inches Number of cubes of 1 inch = (3)3 = 27 Number of unpainted cubes = 1 Required probability = Number of unpainted cubes /Number of 1-inch cubes =1/27

    Practice Next