The table shows data from a survey conducted at five schools to study the rate of…

MATHEMATICS · Multi-part · CBSE · Mathematics · Probability · Probability

Problem

The table shows data from a survey conducted at five schools to study the rate of smoking among 15 year old students.
<i>School</i><i>Number of 15 year olds</i><i>Number of smokers</i>
<i>Male</i><i>Female</i><i>Male</i><i>Female</i>
<b>A</b>45511011
<b>B</b>364296
<b>C</b>52491313
<b>D</b>2833910
<b>E</b>403974
<b>Total</b>2012144844
(1) Estimate the probability that a randomly chosen female 15 year old student at school C is a smoker. (2) Estimate the probability that a randomly chosen 15 year old student at school E is *not* a smoker. (3) If a 15 year old is chosen at random from the five schools, estimate the probability that he or she is a smoker.

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