Question
MATHEMATICS TEST 60 Minutes-60 Questio DIRECTIONS: Solve each problem, choose the correct but some answer, and then fill in the corresponding oval on your using a cal Note: Unle Do not linger over problems that take too much time. be assume Solve as many as you can; then return to the others in 1. Ilustrat 2. Geomet You are permitted to use a calculator on this test. You 3. The wo may use your calculator for any problems you choose, 4. The wo answer document. the time you have left for this test. 1. The blood types of 150 people were determined for a 3. On a About 2 in A. 1 B. 2 C. 3 D. 4 study as shown in the figure below 67 70 E 60 50 40 30 20 E 10 0 & 15 AB blood type If 1 person from this study is randomly selected, what is the probability that this person has either Type A or Type AB blood? 4. Giver A. 150 B. 150 C. 68 K. I 150 73 150 5. If fa E. 150
Explanation / Answer
Let event A= occurrence of people having blood group A and event B = occurrence of people having blood group AB.
According to addition theorem for mutually exclusive events we have P(A or B)=P(A)+P(B).
This is because P(A and B)=0 as there can't be any people having both blood group A and AB .
P( A or B )=67/150+6/150=73/150. Hence correct answer is option d).
