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Flura [38]
2 years ago
8

Work out: C) 3/4 + 1/8=

Mathematics
2 answers:
Fynjy0 [20]2 years ago
7 0

Answer:

7/8

Step-by-step explanation:

3/4=6/8 6/8+1/8=7/8

Maslowich2 years ago
4 0

Step-by-step explanation:

given

3/4 + 1/8

Taking LCM we get

= (3*2 + 1) / 8

= (6 + 1)/8

= 7/ 8

Hope it will help :)✔

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The diameters of ball bearings are distributed normally. The mean diameter is 83 millimeters and the standard deviation is 3 mil
Alenkinab [10]

Answer:

0.2514 = 25.14% probability that the diameter of a selected bearing is greater than 85 millimeters.

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}

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In this question, we have that:

\mu = 83, \sigma = 3

Find the probability that the diameter of a selected bearing is greater than 85 millimeters.

This is 1 subtracted by the pvalue of Z when X = 85. Then

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

Z = \frac{85 - 83}{3}

Z = 0.67

Z = 0.67 has a pvalue of 0.7486.

1 - 0.7486 = 0.2514

0.2514 = 25.14% probability that the diameter of a selected bearing is greater than 85 millimeters.

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