Question

Find P(reptiles I foreign). 29

Answer 1

Answer:

P(reptiles|Foreign) = 32/249

Explanations:

A = 314 - 63 = 251

C = 663 - (314+78+18)

C = 253

B = 253 - 78 = 175

D = 663 - 165 = 498

P(reptiles|foreign) = P(reptiles and foreign) / P(foreign)

P(foreign) = N(foreign) / N(total)

N(foreign) = 498

N(total) = 663

P(foreign) = 498/663

P(reptiles and foreign) = N(reptiles and foreign) / N(total)

P(reptiles and foreign) = 64/663

P(reptiles|foreign) = P(reptiles and foreign) / P(foreign)

P(reptiles|foreign) = 64/663 ÷ 498/663

P(reptiles|Foreign) = 64/498 = 32/249