Question

The urn contains 100 marbles: 30 blue, N green and some red. (1) two draws are made. Calculate N so that the probability of drawing two balls of the same color is 40% (2) a single draw is made. Calculate N so that the probability of drawing a red ball knowing that it is not green is between 45% and 55%

          The urn contains 100 marbles: 30 blue, N green and some red.
(1) two draws are made. Calculate N so that the probability of
drawing two balls of the same color is 40%
(2) a single draw is made. Calculate N so that the probability of
drawing a red ball knowing that it is not green is between 45%
and 55%

The urn contains 100 marbles: 30 blue, N green and some red.
(1) two draws are made. Calculate N so that the probability of
drawing two balls of the same color is 40%
(2) a single draw is made. Calculate N so that the probability of
drawing a red ball knowing that it is not green is between 45%
and 55%

Added by Mario C.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

Instant Answer

Solved by Expert Madhur L

08/10/2023

Step 1

We know that the total number of marbles is 100, so we have: 30 + N + R = 100. Show more…

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The urn contains 100 marbles: 30 blue, N green and some red. (1) two draws are made. Calculate N so that the probability of drawing two balls of the same color is 40% (2) a single draw is made. Calculate N so that the probability of drawing a red ball knowing that it is not green is between 45% and 55%