Pls help! Pls pls answer correctly

Mathematics

1 answer:

frez [133]3 years ago

7 0

1) The correct answer would be -48/-6.

    -48 divided by -6 equals to 8.
     48 divided by -6 equals to -8.

   Because a positive (8) is always bigger than a negative (-8). The second option is correct.

_____________

2) The correct answer is -6.

   5 * 2 = 10.

   And 4 - 10 = (-6)

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A 0.0003% probability that a randomly chosen person is a terrorist.

A 98% probability that a future terrorist is correctly identified

A 99.9% chance of correctly identifying someone who is not a future terrorist. This also means that there is a 0.01% probability of someone who is not a terrorist being identified as one.

This can be formulated as the following problem:

What is the probability of B happening, knowing that A has happened.

It can be calculated by the following formula

$P = \frac{P(B).P(A/B)}{P(A)}$

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Here we have:

What is the probability that the person is a terrorist, given that she was identified as a terrorist.

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P(A/B) is the probability that the person was identified as a terrorist, given that she is a terrorist. The problem states that the system has a 98% chance of correctly identifying a future terrorist, so $P(A/B) = 0.98$