Question

if there is a 30 chance of sun tomorrow and a 20% chance of win and no sun what is the probability that it is windy, given that it is not sunny?

Answer 1

yeah see..........!!

You know there's a 20% chance of wind and no sun.

And there must be a 70% chance of no sun.

If you divide 0.20 / 0.70 you get .2857 which rounds to 29%.

The reason why I divided by 0.70 was because I knew that there was no sun, so I knew I had to correct for what had originally been a probability out of 100%. Instead of 100%, I only had 70% left to work with, because the lack of sun got rid of 30%.

So 20% is the chance of no wind, and it's got to be higher than 20% for the above reason, so I divided by 0.70 to make it bigger. That's because when you divide by a decimal like that you actually end up with a bigger number.

..............Hope it helps.............

Answer 2

oh i see so its 29% rounded up

Answer 3

yeah right, genius.

Answer 4

can some one help me?

Answer 5

@joftheworld yeah dude....i am here.