A computer prgrammer builds a 120 ft. rope across a bridge. If the rope breaks where he's standing at a random point, but he's able to cling to one end of it, what's the probability he'll avoid getting wet? Also, suppose the probability is only 1/2 that the rope breaks at all. Suppose that as long as he doesn't fall more than 30 ft., the probability he can climb back up is 3/4. What's the probability he won't fall at all? What's the probability that if he does, he'll be able to climb back up? PLEASE EXPLAIN!!
2006-09-24 13:42:34 · 4 answers · asked by Sofa P 2 in Education & Reference ➔ Homework Help
100% probability that he will not get wet
2006-09-24 13:57:01 · answer #1 · answered by MollyMAM 6 · 0⤊ 0⤋
This question is specifically worded to confuse. You have to weed out what you really need. Read the questions: 1) What's the probability he'll avoid getting wet? 100%. He built the rope over a bridge. 2) What's the probability he won't fall? That was already answered IN the question, there's 50% chance the rope will or won't break. You can say the probability is 50% he won't fall, but you might include a disclaimer that there's no accountability for him just falling, i.e., he loses his balance and just falls. Question 3) What's the probability that if he does, he'll be able to climb back up? That's 100% percent too, since it IS on a bridge and he can walk at any point he falls down on the bridge to one side of the rope and climb back up.
The simple version:
1) 100%
2) 50% or 1/2
3) 100%
2006-09-24 20:58:38 · answer #2 · answered by ? 2 · 0⤊ 0⤋
100% the rope is built across a bridge. If the rope snaps he will land on the bridge
2006-09-24 20:49:31 · answer #3 · answered by jth91191 3 · 0⤊ 0⤋
How far down is the water from the rope? Without this info. it is impossible to answer the question.
2006-09-24 20:45:22 · answer #4 · answered by DanE 7 · 0⤊ 0⤋