ravenconner85

20.12.2019 • 

Mathematics

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 , i'm willing to learn!

Ответ:

coolquezzie

13.01.2022

Mathematics

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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 :)

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Ответ:

ctyrector

30.10.2020

Mathematics

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When cross products are equal, they will have the same ratio. You can prove this by cross multiplying the fractions:

5|3 = 7|4.20

Cross multiply the two:

21=21

This proves that the ratios are equivalent.

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