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3 years ago

Is Each Number Rounded Correctly to the nearest ten thousand?

Mathematics

1 answer:

zvonat [6]3 years ago

5 0

You have correctly answered the last 3 questions in this list, so the answer to the first one left blank is no.

This is because 455,000 rounded to the nearest ten thousand is 460,000, rounding to 456,000 is rounding to the nearest one thousand.

I hope this helps!

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A bag contain 80 balls numbered 1,...,80. before the game starts, you choose 10 different numbers from among 1,..80 and write th

alekssr [168]

Answer:

a. 0.24094

b. 0.2494

c. 0.1473

Step-by-step explanation:

The total probability of choosing any 20 random balls out of 80 is $80 \choose 20 \\$ . We use combination since the order of selection does not matter

a. P(all numbers are selected)

$10 \choose 10$ are our numbers, $70 \choose 10$ is the selection of other ten numbers apart from our numbers.

$\frac{{10\choose 10}{70 \choose 10}}{{80 \choose 20}} = 0.24094$

b. P(none of them are selected)

Since none of our numbers are selected, we assume that all the numbers selected are from the other 70.

$\frac{{70 \choose 20}}{{80 \choose 20}} = 0.2494$

c. P (exactly four are selected)

Only four from our numbers are selected and the rest 16 from the other 70 numbers.

$\frac{{10\choose 4}{70 \choose 16}}{{80 \choose 20}} = 0.1473$

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