<PRE><B>Question 1197681</B>
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Hi  
31 students: 16G, 15B, 3GR, 2BR
choose 1
&lt;font color = red&gt;&lt;font size = 4&gt;&lt;b&gt;P(A or B) = P(A) + P(B) - P(A and B)&lt;/font&gt;&lt;/font&gt;&lt;/b&gt;
P(B 0r R) = P(B) + P(R) = 15/31 + 5/31 - 2/31 = 18/31 

Wish You the Best in your Studies.
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