Probability Problem? Help me Find the solution Please

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ieltstrategies

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Sep 28, 2014
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2 points a1 and a2 in B place, and you want to discover if gold rate is above 60 gr . Also, there is a 4/5 probability that any point in B place is below 60gr. You have the data about the probability that both a1 and a2 are simultaneously below 60gr is equal to 3/4.

probability a1 is above 60 gr given a2 is below 60gr?
I found 5/8
probability both a1 and a2 are simultaneously above 60gr?
I found 1/4
 
ieltstrategies said:
2 points a1 and a2 in B place, and you want to discover if gold rate is above 60 gr . Also, there is a 4/5 probability that any point in B place is below 60gr. You have the data about the probability that both a1 and a2 are simultaneously below 60gr is equal to 3/4.

probability a1 is above 60 gr given a2 is below 60gr?
I found 5/8
probability both a1 and a2 are simultaneously above 60gr?
I found 1/4
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Please reply with the full and exact text of the exercise, the complete instructions, and clear definitions of the various (mathematically) undefined terms, such as "B place", "gold rate", and "gr".

When you reply, please provide a clear statement of the steps and reasoning by which you arrived at your answers. Thank you! ;)
 
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