EC= eye color

Question

RFL= ring finger longer
RFNL= ring finger not longer

EC RFL RFNL Total
Blue 20 17 37
Brown 27 22 49
Green 15 7 22
Other 12 5 17
Total 74 51 125

D) What is the probability that the student selected has green eyes and a ring finger longer than his/her index finger?
E)What is the probability that the student selected has green eyes or a ring finger longer than his/her index finger?

Please help and explain/show how to do these.

Answer 1

D. 7/125 (specific category/grand total)

E. Green eyes = 22/125 (category total/grand total)
RFL = 74/125

For "either-or" probability, you add the individual probabilities.

I hope this helps. Thanks for asking.