a car travels 1/2 of the distance between two cities in 3/5 of an hour .at this rate what fraction of the distance between the t
2 answers:
Remark
The easiest way to do this is to set up a proportion. But be careful how you do it.
Call the distance d
1/2 d / 3/5 hour = x * d / 1 hour
Divide both sides by d
1/2 // 3/5 = x / 1 Cross multiply
1/2 * 1 = 3/5 x divide by 3/5
Invert the bottom fraction and multiply.
The answer is 5/6 of the distance will be covered in 1 hour.
The easiest way to do this is to set up a proportion. But be careful how you do it.
Call the distance d
1/2 d / 3/5 hour = x * d / 1 hour
Divide both sides by d
1/2 // 3/5 = x / 1 Cross multiply
1/2 * 1 = 3/5 x divide by 3/5
Invert the bottom fraction and multiply.
The answer is 5/6 of the distance will be covered in 1 hour.
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Answer:
The minimum sample size needed for use of the normal approximation is 50.
Step-by-step explanation:
Suitability of the normal distribution:
In a binomial distribution with parameters n and p, the normal approximation is suitable is:
np >= 5
n(1-p) >= 5
In this question, we have that:
p = 0.9
Since p > 0.5, it means that np > n(1-p). So we have that:
The minimum sample size needed for use of the normal approximation is 50.