A mythology class is composed of 14 sophomores, 21 juniors, and 18 seniors. On the first exam, 2 sophomores, 5 juniors, and 8 seniors earned A's. Find the probability that a student who received an A is a junior. (Round your answer to three decimal places.)

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A:

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Q: (3) 2.3-= 3" – 1 i=1 k+1 Hint: 2-3-1 = 2-3i-1+2-3'k+1)-1 = 3* –1+2-3* = 3-3* –1 = 3*+1_1 i=1 i=1

A: ∑i=1n2.3i-1=3n-1for  n=1∑i=1n2.3i-1=2.30=2=31-1,    truefor n=2∑i=1n2.3i-1=2.30+2.31=2+6=8=32-1,…

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Statements and Logic

Logic is the analysis of general patterns of thoughts without regard to any specific sense of context.