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Scilla [17]
3 years ago
10

A novel is 11/16 inch thick. If there are two shelves, each 99 inches wide, how many novels will be able to fit on the two shelv

es?
Mathematics
1 answer:
34kurt3 years ago
8 0
First let's just combine the shelves to make it easier. 99 + 99 = 198.

We can simply divide 198 by 11/16 to get the answer. First let's convert 11/16 to a decimal.

11 divided by 16 is 0.6875

So 198 divided by 0.6875 is 288.

288 novels can fit on both the shelves.
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We are given that a manufacturer of Christmas light bulbs knows that 10% of these bulbs are defective. It is known that light bulbs are defective independently. A box of 150 bulbs is selected at random.

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<em>Now, we can't calculate the required probability using binomial distribution because here n is very large(n > 30), so we will convert this distribution into normal distribution using continuity correction.</em>

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<u>Mean of X</u>, \mu = n \times p = 150 \times 0.10 = 15

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(b) Expected number of defective light bulbs found in such boxes, on average is given by = E(X) = n \times p = 150 \times 0.10 = 15.

                                           

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