Mathematics, 30.10.2020 22:20, bqg464

An Urn contains two white marbles and one black marble. A marble is drawn from the Urn without replacement and put aside without my seeing it. Then a second marble is drawn, and it is white. What is the probability that the unknown removed marble is white, and what is the probability that it is black?

Answers: 1

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answered: Guest

answer: rotate 270° clockwise about (7, 1) and reflect across the line x = 7

step-by-step explanation:

because i took test

Identify the transformation that maps the figure with center (7, 1) onto itself. a) rotate 180° cloc

answered: Guest

step-by-step explanation:

infinity is the answer

answered: Guest

answer: - (a) $a_n=16+6n$

(b) 88 seats

step-by-step explanation:

given: in an auditorium, there are 22 seats in the first row and 28 seats in the second row.

thus first term= $a_1 =22$

second term= $a_2 =28$

the number of seats in a row continues to increase by 6 with each additional row.

⇒d= 6

a) given formula : $a_n=a_1+(n-1)(d)$

$a_n=22+(n-1)6\\\rightarrow\ a_n=22+6n-6\\\rightarrow\ a_n=16+6n$

b) let the number of seats (n) = 12

substitute n=12 in the explicit rule formed in (a)

$a_{12} = 16+6\times12\\\rightarrow\ a_{12}=16+72\\\rightarrow\ a_{12}=88\ seats$

∴there are 88 seats in 12 rows.

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An Urn contains two white marbles and one black marble. A marble is drawn from the Urn without repla...