Answered

All human blooid is one of the four types : O , A,B or AB. The distributions of the types varies a bit with race. If you choose an African American person at random , here is a table of the approcimate probabilities of that person having each of the different blood types.


Blood Types : O A B AB

0.5 ? 0.2 0.05


Using the table of probabilities above , the probability that the person chosen has blood type A is :

0.05

0.25

0.27

0.40

0.65


I'm having a bit of trouble with probability may someone walk me through it please, I'm willing to learn!

Verified Answer :

baabaagreysheep

Your answer is 0.25

When dealing with probability, you know that the total must be equal to 1 when in decimals, or 100% when in percentages. This means that whatever the other 3 probabilities add up to, you must subtract that from 1 because you need what is left over as the total must be 1. 0.05 + 0.5 + 0.2 = 0.75, so 1 - 0.75 = 0.25

I hope this helps! I tried to explain but let me know if you still don't understand probability that well and I can help more :)

Related Questions