Explore BrainMass

Explore BrainMass

    Probability: Random Selection

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    Two balls are drawn in succession from a box containing 4 red and 2 white balls.
    a) What is the probability of drawing a red ball on the second draw if the first one is not put back in the box after it is drawn?
    b)What is the probability of drawing a red ball on the second draw if the first one is put back in the box after it is drawn?

    © BrainMass Inc. brainmass.com March 4, 2021, 5:46 pm ad1c9bdddf
    https://brainmass.com/math/probability/probability-random-selection-10282

    Solution Preview

    Part (a)
    --------
    There are two ways in which you can draw a red ball on the second draw : (i) You draw a red ball in Draw 1 and then draw another red ball on Draw 2 (without putting the first one back!) OR (ii) You draw a white ball in Draw 1 and then draw a red ball on Draw 2 (again without putting the first one back!)

    Since there are 4 red balls and 2 white balls in the box, the probability of drawing a red ball in Draw 1 is 1/4 (one ...

    Solution Summary

    A random selection probability problem is solved.

    $2.19

    ADVERTISEMENT