Let's suppose that these six individuals are a representative sample from the population.
So to figure out this we can calculate 40% of 6, which is 2.4 individual.
So 2.4 individual from the six may have A blood group (you can keep the number as it is, or round to 2).
Answer:
The mean number of individuals having group a blood is 2.4 individuals.
Explanation:
We can solve this problem using concepts of the binomial probability distribution.
Binomial probability distribution
Probability of exactly x sucesses on n repeated trials, with p probability. Has a mean of
[tex]E(X) = np[/tex]
In this problem, we have that
40 percent of all individuals have group a blood. This means that [tex]p = 0.4[/tex].
If six individuals give blood, find the mean number of individuals having group a blood.
We work with six individuals, so [tex]n = 6[/tex].
The mean is:
[tex]E(X) = np = 6*0.4 = 2.4[/tex]
The mean number of individuals having group a blood is 2.4 individuals.
