A basket contains five red balls, four white balls and three blue balls. Two balls are drawn, one after the other, with the first ball replaced before the second is drawn.Find the probability of drawing either at least one white ball or exactly one red ball.
What will be an ideal response?
Pr(at least one white ball)+Pr(exactly one red ball)-Pr(at least one white ball ? exactly one red ball) = 
+ 
- 
= 
Mathematics
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Refer to the following normal curve, with mean ? and standard deviation ?.
If the standardized value of x is 0.5, then x =
A. 120. B. 137. C. 100. D. 80. E. none of these
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Solve the proportion. Round the solution to the given place value.
= 
; hundredths place
A. 253.33 B. 12.83 C. 0.08 D. 6.32
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Write an equation in slope-intercept form for the line shown.
A. y = 
B. y = 3x
C. y = 
D. y = -3x
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Find the median for the given sample data.The salaries of ten randomly selected doctors are shown below.
Find the median salary.
A. $236,000 B. $262,000 C. $176,000 D. $184,000
Mathematics