Jillian surveyed students at her school and found out the following probabilities:
P(freshman) = 0.30
P(plays instrument) = 0.20
P(freshman and instrument) = 0.10
Find the probability that a student plays an instrument given they are a freshman.
P (plays instrument freshman)

Jillian surveyed students at her school and found out the following probabilities: P(freshman) = 0.3

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Ответ:

igraha17

06.01.2022

Mathematics

First option is correct.

Step-by-step explanation:

Since we have given that

(-2x^3y^2+4x62y^3-3xy^4)-(6x^4y-5x^2y^3 -y^5)

1) Open a bracket with the sign changed to the second expression within the brackets:

$(-2x^3y^2+4x^2y^3-3xy^4)-(6x^4y-5x^2y^3 -y^5)\\\\=-2x^3y^2+4x^2y^3-3xy^4-6x^4y+5x^2y^3 +y^5$

2) Gather the like terms together:

$(-2x^3y^2+4x^2y^3-3xy^4)-(6x^4y-5x^2y^3 -y^5)\\\\=-2x^3y^2+4x^2y^3-3xy^4-6x^4y+5x^2y^3 +y^5\\\\=-2x^3y^2+4x^2y^3+5x^2y^3-3xy^4-6x^4y+y^5\\\\=-2x^3y^2+9x^2y^3-3xy^4-6x^4y+y^5$

Hence, First option is correct.

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Jillian surveyed students at her school and found out the following probabilities: P(freshman) = 0.30 P(plays instrument) = 0.20 P(freshman and instrument) = 0.10 Find the probability that a student plays an instrument given they are a freshman. P (plays instrument freshman)