Solve the problem.Find the expected number of girls in a family of 4.
A. 1.5
B. 2.5
C. 1.75
D. 2
Answer: D
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Solve the problem.Twenty random numbers are generated to simulate the outcomes of the sexes of the children in a three-child family. If an even digit simulates a girl and an odd digit a boy, use these results to determine the probability that a family has at most one boy.590506021366063667374153662591685274310673964351774640298961
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Solve the problem.Which of the lines in the picture are lines of symmetry of the given figure?
A. r, s, and t B. s C. q and s D. q, r, s, and t
Given that m varies jointly with the square of n and the square root of q and src="https://sciemce.com/media/3/ppg__cognero__2.6_Proportion_and_Variation__media__da4d1a8a-87b2-4ae8-acf7-ade39f3b43f4.PNG" class="wirisformula" align="middle" style="vertical-align: middle;" data-wiris-created="true" varid="variable_id_field" variablename="impvar_bc36d31d1a1d4172843f90baa" />, find m when 
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E. 
Solve the problem.Tracy can wallpaper 5 rooms in a new house in 40 hours. Together with her trainee they can wallpaper the 5 rooms in 23 hours. How long would it take the trainee working by herself to do the job?
A. 40 hr B. 95 hr C. 110 hr D. 55 hr