A school knows that 38% of its incoming students own a smart phone and a tablet.what percent of students who own a smartphone also own a tablet if 84% of students own a smart phone

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fattyalberttooowc93o fattyalberttooowc93o

24-05-2018
Mathematics

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A school knows that 38% of its incoming students own a smart phone and a tablet.what percent of students who own a smartphone also own a tablet if 84% of students own a smart phone

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asadullahgiki asadullahgiki · Answer 1 · 2018-05-29T12:29:42+02:00

No. of students own a smart phone=B= 84%
No.of students own a tablet=A
No. of students own a smart phone and tablet= A∩B =38%

We use the conditional probability to do this problem;
Pr(A|B)=Pr(A∩B)/Pr(B)
=0.38/0.84
=0.45
=45%(no. of students own a smartphone also own a tablet)