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zubka84 [21]
3 years ago
15

**Absurd answers won't be tolerated** They're about 50 students in a class that took a test. 21 of those students passed. If 13

students made a F, find the percent of 50 to 21. Explain.
Mathematics
1 answer:
xxTIMURxx [149]3 years ago
4 0

Answer: About 10.5 passed.

Step-by-step explanation:

1. Convert 50% into a decimal.

  • First, convert 50% into a fraction, which is 1/2.

  • Divide 1/2 by its numerator and denominator.

  • 1 / 2 = 0.5

Hence, the answer is 0.5.

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Step-by-step explanation:

<u><em>Step(i):</em></u>-

Given mean of the Population = 25cm

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Z = \frac{x-mean }{S.D} = \frac{22-25}{2.60} = -1.15

<u><em>Step(ii):</em></u>-

The probability of randomly selecting a rod that is shorter than 22 cm

P(X<22) = P( Z<-1.15)

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The probability of randomly selecting a rod that is shorter than 22 cm

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