Question

@ganeshie8
At Hamilton University, it is observed that 90% of the students pass mathematics, 85% pass English, 78% pass both courses.
What are the odds in favour of passing mathematics and failing English?

Answer 1

The Venn diagram is not in question i just made that to see it better, not sure if its right though.

Answer 2

the odds are 12 to 100-12

Answer 3

Unfortunately i dont see how you got that

Answer 4

but it is right

Answer 5

assuming 100 people

(pass math) - (pass math and pass english) = (pass math and fail english)

agreed?

Answer 6

yes

Answer 7

so 90-78 = 12

odds tend to be written as for:against such that for + against is equal to the total population count

Answer 8

since we assumed 100:

then 12 are for, and 100-12 are againt

Answer 9

oh okay

Answer 10

or written another way: U = A + A'

and odds are written as: A : A'

Answer 11

Okay i see it now, thanks for the help :)

Answer 12

good luck