2011
Mathematics
JAMB
In a class of 60 students, 30 offers physics and 40 offers chemistry. If a students is picked at random from the class, what is the probability that the student offer both physics and Chemistry?
A.
1/2
B.
1/6
C.
1/4
D.
1/3
Correct Answer: 1/6
Explanation
60 = 30 – x + x + 40 – x 60 = 70 – x x = 10 n(P∩C)=10 Prob(P∩C)=10/60=1/6
60 = 30 – x + x + 40 – x 60 = 70 – x x = 10 n(P∩C)=10 Prob(P∩C)=10/60=1/6THIS WEEK's
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