When x is 6, then y is x: 2 3 4 5 6 y:-3 -2 -1 0 ?Complete the table.
2 answers:
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Answer:
a)
b) SD(x) = 0.9986
Step-by-step explanation:
Given data:
Number of slots 38
slots for red ball 18
slots for black = 18
slots for green 2
outcomes Red Black or Green
Profit 1 -1
P(X) 18/38 20/38
Expected value of wining,
B) Standard deviation of winning SD(x)
SD(x) = 0.9986
The r% of a quantity x is computed by dividing x in 100 parts, and considering r of such parts. So, the r% of the male is
and similarly, the r% of female is
The number of males decreased by this quantity, so now it is
and the number of female increased by this quantity, so now it is
we know that these two new counts are the same number, so we can build and solve the equality
Subtract 20 and add 0.3r from both sides:
Divide both sides by 0.5 to solve for r:
Let's check the answer
The 20% of 30 is , while the 20% of 20 is 4. So, we are stating that
which is true because both expressions evaluate to 24.