Question 859072
1)
The probability that both are read is .5*.4=0.2
The probability that only SI is read is .5-.2=0.3
The probability that only Time is read is .4-.2=0.2
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2)The probability that both are not read is 1-(.2+.3+.2)=0.3
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Use a Venn diagram to understand this.
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Ed