What is the approach to solve?

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czarczar: Master | Next Rank: 500 Posts; Posts: 106; Joined: Fri Feb 05, 2010 9:39 amFollowed by: 1 member; Thanked: 4 times

by czarczar » Fri Aug 19, 2011 11:17 am

I just want to know the approaches to solve such questions as:

6 coins are tossed or a coin is tossed 6 times, what is the probability of not getting the same outcome on two consecutive tosses.

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Source: Beat The GMAT — Problem Solving | Fri Aug 19, 2011 11:17 am

winniethepooh: Master | Next Rank: 500 Posts; Posts: 370; Joined: Sat Jun 11, 2011 8:50 pmFollowed by: 2 members; Location: Arlington, MA.; Thanked: 27 times

by winniethepooh » Fri Aug 19, 2011 3:29 pm

It would be better to type 2 questions for your doubt in 2 threads. Please follow your questions with options.

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dmf5238: Junior | Next Rank: 30 Posts; Posts: 29; Joined: Sun Jun 26, 2011 9:19 amFollowed by: 1 member; Thanked: 3 times; GMAT Score:710

by dmf5238 » Fri Aug 19, 2011 3:40 pm

This is an "and" probability problem, so you multiply the probabilities.

Take the probability of each consecutive desired action, and multiply them together to find your total probability that the sequence will take place.

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