You leave your apartment groggily one morning, closing the door behind you. Suddenly, you are hit bya terrifying question: Do you have your keys, or are you now locked out?
You stand there thinking about it for a few seconds, before deciding that yes, you probably have your keys, further estimating that 80% of the time, you have them. You also decide that there is an equal chance of your keys either being in your left pocket or your right pocket, and if they aren’t in either pocket then you don’t have them at all.
Slowly, perversely enjoying the sweat, you slide your hand into your right pocket, and find that your keys are not there. What should you now think is the probability that your keys are in your left pocket?
0.4?more challenging qn (smu shld use it for their scholarship interview)
more challenging qn (smu shld use it for their scholarship interview)
The interviewer asked a question to all 8 of us, if you have a cup with 1 white ball and 2 black balls, and it is a competition. Person who picks the white ball wins. Would you go first or go second?
The rest all give very cock reason like i will share the winnings etc etc
I tried to be different from the rest and I answered "it dosent matter which, same chance of winning." when the interviewer asked why, i tell him gut feeling LOL. After i explain becase it dosent matter what colour ball the first person got, because there is only 1 white ball in total. After that i worked out the probability in front of everyone.
SAKTI a not??! Got chance they will accept me?
I did screw up the front part because i volunteered to go first and describe myself. Got nothing to say
more challenging qn (smu shld use it for their scholarship interview)
Lol, 50 percent lerhs bro. Either u have it or not. Just a whole wot to disorientate u niah.
why do u guys pull the overall % of the whole. The interviewer ask u wan to go 1 or 2 to pick for the white ball. Your logical ans will be 2.
If he ask why. See below:
There is only 2 choice. First or Second.
If you take First = You are trying your luck for 33.3% chance to win.
If you take Second = You are a more logical person. You give up 33.3% for a 50% to win at the second turn.
However, overall. The % of picking the freaking white ball is still equal, but it will be more advantage to the SECOND PERSON WHO PICK.
1st= 33.3%
2nd = 50%
3rd = 33.3%
Get it?
sorry but what is this IMBA logic that I cannot understand?
why 3rd is 33.3% instead of 100%?
why do u guys pull the overall % of the whole. The interviewer ask u wan to go 1 or 2 to pick for the white ball. Your logical ans will be 2.
If he ask why. See below:
There is only 2 choice. First or Second.
If you take First = You are trying your luck for 33.3% chance to win.
If you take Second = You are a more logical person. You give up 33.3% for a 50% to win at the second turn.
However, overall. The % of picking the freaking white ball is still equal, but it will be more advantage to the SECOND PERSON WHO PICK.
1st= 33.3%
2nd = 50%
3rd = 33.3%
Get it?
Logical...
if first to take, 1/3 of the chances,
if 2nd to take left 2 ball, which is 50% chance
if 3rd to take left 1 ball, which is 1/3 chance that u will be the last to take and still obtain the white ball.