For 1 bird house he got $6. If he makes 12 bird houses he will make $72. Put 1 over 6 ( 1\6) and (12\?) Cross multiply and divide, that = $72. If he makes 17 bird houses he will make $102. Put (1\6) and (17\?) Cross multiply and divide and that = $102 $102+$72=$174
There are 25 acres of apple trees, and 40 acres total. Thus, the probability of him NOT finding an apple tree is 1 - (25/40) = 15/40 = 37.5% or the second choice.
