1>What is the probability that one of the two integers randomly selected from range 20-29 is prime and the other is a multiple of 3?
[spoiler]{2/10 * 3/10} *2 = .12[/spoiler]
2>A basket contains 13 fruits: 5 apples and 8 pears. What is the probability that 2 fruits drawn from the basket at random will be pears?
[spoiler]8/13*7/12 = 14/39[/spoiler]
Both question above are from gmat club tests. My query is when do we consider that we are talking about replacements ? I mean the answer trap to the second question could have been 8/13*8/13 (if we considered that the fruit is replaced after withdrawal)
In my first question if we considered that the prime is not being put back then the solution would be {2/10 * 3/9} *2
[spoiler]{2/10 * 3/10} *2 = .12[/spoiler]
2>A basket contains 13 fruits: 5 apples and 8 pears. What is the probability that 2 fruits drawn from the basket at random will be pears?
[spoiler]8/13*7/12 = 14/39[/spoiler]
Both question above are from gmat club tests. My query is when do we consider that we are talking about replacements ? I mean the answer trap to the second question could have been 8/13*8/13 (if we considered that the fruit is replaced after withdrawal)
In my first question if we considered that the prime is not being put back then the solution would be {2/10 * 3/9} *2
Cheers !!
Quant 47-Striving for 50
Verbal 34-Striving for 40
My gmat journey :
https://www.beatthegmat.com/710-bblast-s ... 90735.html
My take on the GMAT RC :
https://www.beatthegmat.com/ways-to-bbla ... 90808.html
How to prepare before your MBA:
https://www.youtube.com/watch?v=upz46D7 ... TWBZF14TKW_
Quant 47-Striving for 50
Verbal 34-Striving for 40
My gmat journey :
https://www.beatthegmat.com/710-bblast-s ... 90735.html
My take on the GMAT RC :
https://www.beatthegmat.com/ways-to-bbla ... 90808.html
How to prepare before your MBA:
https://www.youtube.com/watch?v=upz46D7 ... TWBZF14TKW_
