Question 1210443
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<table border = "1" cellpadding = "5"><tr><td></td><td>A</td><td>B</td><td>C</td><td>Total</td></tr><tr><td>Male</td><td>16</td><td>22</td><td>32</td><td>70</td></tr><tr><td>Female</td><td>13</td><td>17</td><td>25</td><td>55</td></tr><tr><td>Total</td><td>29</td><td>39</td><td>57</td><td>125</td></tr></table>



We randomly select a student. What is the probability that this student got a B?
P = (number who got a B)/(number total)
P = <font color=red>39/125</font>



We randomly select a student. What is the probability that this student is a male who got a B?
P = (number of men who got a B)/(number total)
P = <font color=red>22/125</font>



We randomly select a male student. What is the probability that he got a B?
P = (number of men who got a B)/(number of men)
P = 22/70
P = <font color=red>11/35</font>



We randomly select a student who got a B. What is the probability that this student is a male?
P = (number of men who got a B)/(number who got a B)
P = <font color=red>22/39</font>
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