mathmath333
  • mathmath333
Probablity question
Mathematics
jamiebookeater
  • jamiebookeater
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mathmath333
  • mathmath333
In a certain lottery 10,000 tickets are sold and ten equal prizes are awarded. What is the probability of not getting a prize if you buy (a) one ticket (b) two tickets (c) 10 tickets
Nnesha
  • Nnesha
lol 100% of not getting a prize for meh :P bad luck :P
welshfella
  • welshfella
P(winning with one ticket) = 10/1000 = 0.001

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mathmath333
  • mathmath333
so (a.) not winning a ticket =990/1000 ?
welshfella
  • welshfella
9990/10.000 = 0.999
mathmath333
  • mathmath333
but 1-10/1000=990/1000
mathmath333
  • mathmath333
u earlier said P(winning with one ticket) = 10/1000
welshfella
  • welshfella
its 10 over 10 thousand
welshfella
  • welshfella
yea that was a mistake should be 10 / 10,000
mathmath333
  • mathmath333
ok
sohailiftikhar
  • sohailiftikhar
yes there is a probability
sohailiftikhar
  • sohailiftikhar
it's c
sohailiftikhar
  • sohailiftikhar
probability not getting prize is 10/10,000
kropot72
  • kropot72
If you buy 2 tickets, the probability of not getting a prize is given by \[\large \frac{9990C2}{10000C2}=0.998\] If you buy 10 tickets, the probability of not getting a prize is given by \[\large \frac{9990C10}{10000C10}=0.99\]

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