Menghitung Populasi Golongan Darah

Hello everyone! Today we are discussing Percentage and Population. Given a total population of twenty thousand people and eighteen percent having blood type A B, our task is to find how many residents have blood type B.

Step one is Understanding Percentage. The formula is: Amount equals Percentage times Total Population. For blood type A B, eighteen percent of twenty thousand is eighteen over one hundred times twenty thousand, which equals three thousand six hundred people.

Here is an important note using the Hardy Weinberg Law, where p plus q plus r equals one. Blood type A B equals two p q, type B equals q squared plus two q r, and type O equals r squared. To find type B, we need additional data like frequencies for alleles q and r, or the percentage of type O.

In a common case for the U T B K exam, if blood type O is sixteen percent, then r is zero point four. With two p q at eighteen percent, p and q are zero point three. The percentage of B is q squared plus two q r, which is thirty-three percent. Thus, thirty-three percent of twenty thousand is six thousand six hundred people.

In conclusion, first, calculate the percentage if it is known directly. Second, use the Hardy Weinberg formula if you are asked to find allele frequencies.

And that is how you solve population-based blood group problems. See you next time!