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Oksana_A [137]
3 years ago
6

PLLL HELP! The following is a rhombus, therefore angle CDA is congruent to angle BDA.

Mathematics
1 answer:
arlik [135]3 years ago
8 0

Answer:

The statement is true

Step-by-step explanation:

we know that

In a Rhombus the diagonals bisect opposite angles.

therefore

diagonal AD bisect angle D and angle A

so

m∠CDA≅m∠BDA

m∠CAD≅m∠BAD

diagonal CB bisect angle C and angle B

so

m∠ACB≅m∠DCB

m∠ABC≅m∠DBC

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Answer:

0.3557 = 35.57% probability that one selected subcomponent is longer than 118 cm.

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

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

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

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This is 1 subtracted by the pvalue of Z when X = 118. So

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8 0
3 years ago
In a group of 20 pupils, 3 play the flute only.
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Answer:

\dfrac{1}{4}

Step-by-step explanation:

Given information:

  • Total number of pupils = 20
  • 3 pupils play the flute
  • 6 pupils play the piano only
  • 6 play both instruments

We can assume that 3 pupils play the flute <u>only</u> as we have also been told that 6 pupils play both instruments.

To calculate the probability that a randomly chosen pupil plays neither instrument, first determine how many pupils do not play an instrument by subtracting the number of pupils who do play an instrument from the total number of pupils:

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\sf Probability\:of\:an\:event\:occurring = \dfrac{Number\:of\:ways\:it\:can\:occur}{Total\:number\:of\:possible\:outcomes}

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\implies \textsf{Probability of a pupil playing neither instrument} = \dfrac{5}{20}=\dfrac{1}{4}

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