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The quality assurance engineer of televisions inspects TV's from a large factory. She randomly selects a...

The quality assurance engineer of televisions inspects TV's from a large factory. She randomly selects a sample of 18 TV's from the factory to inspect. Assume that 31% of the TV's in the lot at silver. Let Y be the number of silver TV's selected.

A) find the probability that at least 6 of the TV's selected are silver.

B) find the probability that less than 4 of the TV's selected are silver.

C) find the probability that between 3.5 and 7.5 of the TV's selected are silver.

D) find the mean of Y.

E) find the standard deviation of Y.

All decimals to the ten-thousandths place please.

Math   Statistics-And-Probability   
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Answer #1

please note X And Y Are same here.

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