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Standard X

Mathematics

Probability

Of the bolts ...

Question

Of the bolts produced by a factory 2% are defective. In a shipment of 3600 bolts from the factory, the expected number of defective bolts is

144

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72

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36

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18

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Solution

The correct option is B $72$
2% bolts are defective in production. $p = .02$
In a shipment of $3600 (n)$ bolts from the factory, the expected number of defective bolts is
$E (X) = n p = 3600 \times (.02) = 72$

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Of the bolts produced by a factory 2% are defective. In a shipment of 3600 bolts from the factory, the expected number of defective bolts is

The correct option is B 72 2% bolts are defective in production. p= .02In a shipment of 3600(n) bolts from the factory, the expected number of defective bolts is E(X) =np =3600×(.02) =72

The correct option is B $72$
2% bolts are defective in production. $p = .02$
In a shipment of $3600 (n)$ bolts from the factory, the expected number of defective bolts is
$E (X) = n p = 3600 \times (.02) = 72$