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what is the probability that both are green?

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 jar contains Jelly-Beans, and there are 87 pink, 74 purple, 35 white, 70 black, 25 orange, and 47 green. If two Jelly-Beans are chosen from the jar, what is the probability that both are green?

asked Jun 11, 2014 in PRECALCULUS by bilqis Pupil

1 Answer

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If an event E has n(E ) equally likely outcomes and its sample space S has n(S ) equally likely

outcomes, the probability of event E is image.

To find the number of elements in an event, use the formula for the number of combinations of 47 elements taken 2 at a time.

image

Number of elements = 87 + 74 + 35 + 70 + 25 + 47 = 338.

To find the number of elements in sample space, use the formula for the number of combinations of 338 elements taken 2 at a time.

image

Probability of getting both green when two jelly-beans are drawn is image.

 

answered Jun 12, 2014 by joly Scholar

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