Mathematics - 3 July 2007

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Probabibility Word Problem- How many minutes will it take, on average to defeat a lock?

A security lock has 5 push buttons. The correct code requires that all 5 buttons be pushed. You may push them one at a time or in pairs. No button can be pushed more than once.
Suppose you have developed a systematic way to check every combination and you have developed enough skill to test any given combination in 5 seconds. How many minutes will it take you on average to defeat a lock?
Hint: On average you must test half the combinations for success. This will require more than one term.

2007-07-03 02:40:39 · 1 answers · asked by Anonymous

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how can i solve this?

tickets were on sale in three weeks.the third week, twice as many as the tickets were sold in the 1st and 2nd combined.How many tickets were sold in the third week?

2007-07-03 02:33:46 · 6 answers · asked by Anonymous

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