1. MULTI-STEP PROBLEM There are 5743 known

amphibian species in the world. Of these,
1856 species are judged to be at risk of
extinction, and another 113 species may
already be extinct.
a. Find the probability that an
amphibian species chosen at
random is at risk of extinction
or may already be extinct.
b. Find the probability that two
different amphibian species,
each chosen at random, are at
risk of extinction.

1 answer

1856 + 113 divided by 5743