10a^2 + a = 8a^2+ 55
1 answer:
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Answer: Required mean would be 15.
Step-by-step explanation:
Since we have given that
Number of girls G= 75
Number of boys B= 100
Probability that girls smoke = P₂ = 0.20
Probability that girls don't smoke = P'₂=1-0.20=0.80
Probability that boys smoke = P₁ = 0.30
Probability that boys don't smoke = P'₁=1-0.30=0.70
We need to find the mean of the sampling distribution of the difference in the sample proportion of girl smokers and boys smokers.
So, it becomes,
Hence, required mean would be 15.
The given expression written in the simplest rational exponent form is
From the question, we are to write the given expression in exponent form
The given expression is
In exponent form,
and
Thus, becomes
Applying the multiplication law of indices, we get
=
Hence, the given expression written in the simplest rational exponent form is
Learn more on Writing an expression in exponent form here: brainly.com/question/4421494
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