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Posted by on Thursday, December 18, 2008 at 5:17pm.

I have to find the probability of this event. heads on a coin and 5 on a 6 sided number cube, on one toss of a coin, and one roll of a number cube. Do I multiply the numbers 1/2 and 1/6, or add them? Thanks.

  • Algebra - , Thursday, December 18, 2008 at 5:23pm

    You would multiply them to show the number of different combonations you can get for this event, but it would also show the probabilty.

  • Algebra - , Thursday, December 18, 2008 at 5:28pm

    Generally, if the two events are mutually exclusive,
    that is, one event has no effect on the outcome of the other,

    then if you want the Prob(eventA AND eventB) you multiply them
    if you want Prob(eventA OR eventB) you add them

    so probability of 5 and heads would be 1/12
    but
    the probability of a 5 or heads would be
    1/2 + 1/6 = 2/3

  • Algebra - , Thursday, December 18, 2008 at 5:30pm

    reiny could you answer my chemistry lab question possibly?

  • Algebra - , Thursday, December 18, 2008 at 5:51pm

    Sorry Redfire, the only thing I know about chemistry is that if I toss an Alka Selzer into a 7-Up bottle it causes quite a mess.

  • Algebra - , Thursday, December 18, 2008 at 5:54pm

    lol that is fine

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