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October 25, 2025, 12:24:14 am
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Author Topic: final probability question  (Read 883 times)  Share 

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sachinmachin

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final probability question
« on: November 09, 2009, 07:33:00 am »
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In the region where Emma is butterfly hunting, 20% of the yellow butterflies are Jojos and the other 80% are Fhaisis.

The probability that a random selected Jojo butterfly antenna is shorter than 20mm is 0.1370.
i. Calculate the proportion, correct to three decimal places, of all Jojo and Fhaisis butterfly antennas from this region that are shorter than   
   20mm.

Emmy examined a single butterfly antenna from this region. It was shorter than 20mm.
ii. What is the probability, correct to three decimal places, that it is a Fhaisi antenna?

any help (particularly part i.) would be greatly appreciated (with 4 hours to go)

 
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