Question

compound events
question id : 413378
9 of 10
suppose that type a blood is needed from donors. if 40% of donors have type a blood and you want to estimate the probability that it will take at least four donors to find one with type a blood, how could you simulate a blood donor having or not having type a blood?
a 0, 1, 2, 3, 4 could represent type a blood, and 5, 6, 7, 8, 9 could represent non-type a blood.
b 0, 1, 2, 3 could represent type a blood, and 4, 5, 6, 7, 8, 9 could represent non-type a blood.
c 0, 1, 2, 3, 4 could represent non-type a blood, and 5, 6, 7, 8, 9 could represent type a blood.
d 0, 1, 2, 3 could represent non-type a blood, and 4, 5, 6, 7, 8, 9 could represent type a blood.

Explanation:

We need 40% of the 10 total digits (0-9) to represent type A blood, which is 4 digits. The remaining 6 digits represent non-type A blood.

Answer:

B. 0, 1, 2, 3 could represent type A blood, and 4, 5, 6, 7, 8, 9 could represent non-type A blood.