Answer:
6:1:2.
Step-by-step explanation:
If Ben's score is x then Abel's is 6x and Cal's is 6/3 = 2x.
Then Abel's to Ben's to Cal's
= 6x : x : 2x
= 6:1:2.
Answer:
=14+7x=35
=7x =35-14
=x =21/7
x=3
The answer is 3
Step-by-step explanation:
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Answer: 0.4667
Step-by-step explanation:
According to 68–95–99.7 rule , About 99.7% of all data values lies with in 3 standard deviations from population mean (
).
Here , margin of error = 3s , where s is standard deviation.
As per given , we have want our sample mean
to estimate μ μ with an error of no more than 1.4 point in either direction.
If 99.7% of all samples give an
within 1.4 , it means that

Divide boths ides by 3 , we get

Hence, So
must have 0.4667 as standard deviation so that 99.7 % 99.7% of all samples give an
within 1.4 point of μ .
Because there both addition