There is a 72% chance that Katie will get married, a 46% chance that she will graduate college, and a 60% chance that she will marry and graduate. What is the chance that she will get married or graduate?

Question

amistre64 · Answer

theres a formula for this ...

P(AuB) = P(A) + P(B) - P(AnB)

muzzack · Answer

what is the formula called @amistre64

amistre64 · Answer

i call it fred .... not sure if it has a technical name

muzzack · Answer

ok well @amistre64 just gave you the formula now plug in the numbers

muzzack · Answer

what does P represent @amistre64

amistre64 · Answer

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notice that in the venn diagram:

A = 1+2 ;  B = 2+3 ;  and AnB = 2

A or B is usually thought of as the union of the set A with the set B.

1+2 + 2 + 3   is not an accurate representation of the union of the sets,  its heavy by 2 (its counted twice)

to adjust for this we have to subtract out the repetition