Final answer:
The probability that at least 4 out of 10 people will have type A blood is 0.6.
Step-by-step explanation:
To determine the probability that at least 4 of 10 people will have type A blood, we can simulate the situation using the given random digits. Starting from the beginning of the random digits, we count the number of times the digits '3' and '1' appear, as these represent type A and type AB blood. We consider a count of '3' or '4' as a person having type A blood. The total number of counts greater than or equal to 4 divided by the total number of trials (10 in this case) will give us the probability.
The five trials using the given random digits yield the following counts: 3, 2, 4, 3, and 3. Out of the five trials, three trials have counts greater than or equal to 4. Therefore, the probability of getting at least 4 out of 10 people with type A blood is 3/5 or 0.6.