Nanna's italian restaurant has collected data about customer sauce orders. it calculated that p(marinara) = 0.64, p(alfredo) = 0.56, and p(marinara or alfredo) = 0.89. determine the p(marinara and alfredo).

To answer this question, apply this formula P(m and a) = P(m) + P(a) - P(m or a). Where m stands for marinara and a stands for alfredo.

P(m and a) = P(m) + P(a) - P(m or a)
P(m and a) = 0.64 + 0.56 - 0.89
P(m and a) = 0.31