a shopkeeper buys coffee at 4.20 per kg and sells it at 63 cents per 100 g Calculate his profit percentage

Mathematics

1 answer:

Bingel [31]3 years ago

7 0

420 cents for 1000 g. So 42 cents for 100 g (i crossed multiplied). %profit=63-42/42 *100=50%

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Answer:

57.93% probability that a trip will take at least 35 minutes.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 36, \sigma = 4.9$