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26 Nov 2003, 15:12
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Morgan Stanley is hosting an investment conference in sunny Phoenix and the investors attending the conference are offered to either play tennis or golf. 90% of the attendees who know how to play tennis also know how to play golf, whereas, 18% of the attendees do not know how to play either sport and will stay in their hotel rooms and do their homework to prepare for their breakout meetings. If 30% of the conference attendees do not how to play tennis, then how many attendees know how to play golf?
1)38.0%
2)46.5%
3)66.0%
4)75.0%
5)84.5%
1)38.0%
2)46.5%
3)66.0%
4)75.0%
5)84.5%
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26 Nov 2003, 20:22
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Explanation please!!!!
27 Nov 2003, 00:07
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Say T is number of tennis player
G is number of golf player
Then 90% of T play golf too
T = 70% of total
=> T&G = .9 * 70% = 63%
now G (that don't play tennis) = (100-18)-70 = 12
G = (T & G) + (G & not Tennis players) = 63+12 = 95
This is a long method and took me about 4 mins to solve. Is there a shorter method to this.
Titleis, is this answer correct?
G is number of golf player
Then 90% of T play golf too
T = 70% of total
=> T&G = .9 * 70% = 63%
now G (that don't play tennis) = (100-18)-70 = 12
G = (T & G) + (G & not Tennis players) = 63+12 = 95
This is a long method and took me about 4 mins to solve. Is there a shorter method to this.
Titleis, is this answer correct?
