Solve the problem.A couple plans to have four children. Using a tree diagram , obtain the sample space. List the elements that make up the sample space. (Use "B" for "boy" and "G" for "girl.")
A. BBBB, BBBG, BBGG, BGGG, GGGG
B. BBBB, BBBG, BBGB, BBGG, BGBB, BGBG, BGGB, BGGG, GBBB, GBBG, GBGB, GBGG, GGBB, GGBG, GGGB, GGGG
C. BBBG, BBGB, BBGG, BGBB, BGBG, BGGB, BGGG, GBBB, GBBG, GBGB, GBGG, GGBB, GGBG, GGGB
D. BBBB, BBB, BB, B
Answer: B
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Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = -3x + 9y
A. Domain: all points in the xy-plane; range: all real numbers; level curves: lines 
c > 0
B. Domain: all points in the xy-plane; range: real numbers z ? 0; level curves: lines 
c ? 0
C. Domain: all points in the xy-plane; range: real numbers z ? 0 ; level curves: lines 
c ? 0
D. Domain: all points in the xy-plane; range: all real numbers; level curves: lines 
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A. x = 0 B. x = -1 C. x = 1 D. none
The probability that a person owns a luxury car is 0.3, and the probability that the owner of such a car also owns a personal computer is 0.5. Find the probability that a person, chosen at random, owns both a luxury car and a computer. ? Please round the answer to the nearest hundredth.
Fill in the blank(s) with the appropriate word(s).