(adsbygoogle = window.adsbygoogle || []).push({}); Statistics, slightly urgent

my answers: 7. At Uptown University, language courses are oered in French and Span-

ish. 47% of the students study French and 39% study Spanish. 22% of

the students study both French and Spanish.

(a) What percentage of the students study a language (French or

Spanish)?

(b) What is the probability that a student studies French but not

Spanish?

(c) A student is selected randomly. Are the events A=fthe student

studies Frenchg and B=fthe student studies Spanishg indepen-

dent? Why or why not?

(a) F or S = F + S - F and S = .47 + .39 - .22 = 64%

(b) F and (not S) = F - F and S = .47 - .22 = 25%

(c) No, F*S <> 22%

I got (b) wrong. On the answer sheet (this is a practice midterm) there is:

Well I drew a picture and I still think it's .47 - .22, not .47 - .22*.25 .47-.22.25 (draw a picture of the events to see this)

:grumpy:

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# Statistics, slightly

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