Help please - Probability
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Help please - Probability
Can anyone help me with this question please?
Siobhan has 0.8 chance of passing English GCSE, and a 0.6 chance of passing Maths GCSE. What is the probability that she will pass either English or Maths?
Thank you
Siobhan has 0.8 chance of passing English GCSE, and a 0.6 chance of passing Maths GCSE. What is the probability that she will pass either English or Maths?
Thank you
probabilty
This doesn't seem a very well worded question - are they looking for the probability that she passes at least one of English & maths (which would be 0.92 or 1-(prob she fails both = 0.08) or the probability she passes only one or the other but not both (which is 0.44 as shown by Guest55)
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Re: Help please - Probability
Here's my answer...Nikki wrote:Can anyone help me with this question please?
Siobhan has 0.8 chance of passing English GCSE, and a 0.6 chance of passing Maths GCSE. What is the probability that she will pass either English or Maths?
Thank you
This is 1 - p(failing both)
p(fail english) = 1-0.8 = 0.2
p(fail math) = 1-0.6 = 0.4
p(fail both) = 0.2 x 0.4 = 0.08
p(pass one of other) = 1-0.08 = 0.92
92% chance of passing one or other
Regards
SVE
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