Saturday

October 25, 2014

October 25, 2014

Posted by **Angie** on Saturday, November 24, 2012 at 1:51pm.

Draw a tree diagram for the experiment &

Find the probability of opening the door on the first or second try.

- Math -
**Reiny**, Saturday, November 24, 2012 at 2:07pmprob of picking the right key = 2/5

prob of opening on first try = 2/5

prob of opening on 2nd try = (3/5)(2/5) = 6/25

(2nd try has to be Miss, Success)

prob of 1st OR 2nd try

= 2/5 + 6/25 = 16/25

**Answer this Question**

**Related Questions**

statistics - The probability that a certain door is locked is.6. The key to the ...

Math - Roger knows how many keys a piano has. He knows that some of the keys are...

Math - Roger knows how many keys a piano has. He knows that some of the keys are...

Math - How many ways can 9 keys be arranged on a circular key ring?

physics - a man throws his keys up to his wife 4.00m above. the wife catches the...

Physics - A building superintendent twirls a set of keys in a circle at the end ...

physics - A student throws a set of keys vertically upward to his fraternity ...

physics and math - hi guys, i had the following question but i keep on getting ...

physics - A student throws a set of keys vertically upward to her sorority ...

Physics - A student throws a set of keys vertically upward to her sorority ...