Mathematics, 24.09.2020 06:01, angellll4455
An urn contains 4 white balls and 6 black balls. A ball is chosen at random and its color noted. The ball is then replaced, along with 3 more balls of the same color (so that there are now 13 balls in the urn). Then another ball is drawn at random from the urn.
(a) Find the chance that the second ball drawn is white.
(b) Given that the second ball drawn is white, what is the probability that the first ball drawn is black?
(c) Suppose the original contents of the urn are w white and b black balls, and that after a ball is drawn from the urn, it is replaced along with d more balls of the same color. In part (a), w was 4, b was 6, and d was 3. Show that the chance that the second ball drawn is white is w/w+b
b. Note that the answer does not depend on the value of d. Why is that?
Answers: 3
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How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.
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The boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a) e = 2b - 212 b) b = 2e - 212 c) e = -2b + 212 d) b = -2e + 212
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An urn contains 4 white balls and 6 black balls. A ball is chosen at random and its color noted. The...
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