1e. correct and explain what I did wrong please.

1. Consider the following contingency table which shows the numbers of endangered and threatened species both in this country and abroad. If one species is chosen at random, find the following probabilities. YOU MUST USE PROPER NOTATION! Endangered Threatened U.S Foreign U.S. Foreign Mammals Totals 68 251 10 20 Birds 349 77 175 13 6 Reptiles 271 14 64 22 16 Amphibians 11 116 8 10 Totals 30 170 498 55 43 766 a.) Threatened and in the U. S. ? p ( T n us . ) = 76 6 b.) A mammal or a threatened foreign species? P ( M , V ( T (FI ) = P( M ) + p(T AF ) - p( mint nf ) = 349 43 20 372 746 + 766 746 74 4 c.) The species is an amphibian or threatened and forcign? p ( A " ( TF ) ) = p( A ) + p ( TF ) - P( AnT AF ) 30 43 72 764 + 74 4 d.) The species is not endangered? p(Ec ) = p ( Tnus ) + p (Tuf ) = ss 43 98 766+ 766 746 2.5 e.) Assume the species is endangered, what's the probability that it is a bird and that it's from the U.S.? p ( B n E n us ) = 7 7