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Andreyy89
3 years ago
10

ralph is three times as old as sarah. in 6 years ralph will be twic as od as sarah will be then find ralphs age now

Mathematics
1 answer:
frutty [35]3 years ago
8 0
1) 3S = R 2) R+6= 2 (S+6)= 2S+12 ----> R=2S+61,2 )--> 3S = 2S+6 ---><span>S=6 & R= 3 x 6 = 18Ralph is 18 & Sara is 6 .</span>
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2 years ago
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zavuch27 [327]

The probablity that the sample's mean length is greate than 6.3 inches is0.8446.

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Probability is the likeliness of happening an event. It lies between 0 and 1.

Probability is the number of items divided by the total number of items.

We have to use z statistic in this question because the sample size is greater than 30.

μ=6.5

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First we have to find the p value from 6.3 to 6.5 and then we have to add 0.5 to it to find the required probability.

z=6.3-6.5/0.5

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Probability that the mean length is greater than 6.3inches is 0.3446+0.5=0.8446.

Hence the probability that the mean length is greater than 6.3 inches is 0.8446.

Learn more about probability at brainly.com/question/24756209

#SPJ4

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Answer:

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Step-by-step explanation:

I took the quiz hope this helps

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