A) 12.8
B) 13.5
C) 13.9
D) 13
Correct Answer: C
Solution :
Let population = 100 \[n(A)=25\] \[n(B)=20\] \[n(A\cap B)=8\] \[n(A\cap \overline{B})=17\] \[n(\overline{A}\cap B)=12\] \[\frac{30}{100}\times 17+\frac{40}{100}\times 12+\frac{50}{100}\times 8\] \[5.1+4.8+4=13.9\]You need to login to perform this action.
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