Bunuel wrote:
If each of the bowlers in a tournament bowled an equal number of games, what is the average (arithmetic mean) score of all the games bowled in the tournament?
(1) 70 percent of the bowlers had an average (arithmetic mean) score of 120, and the other 30 percent had an average score of 140.
(2) Each of the 350 bowlers in the tournament bowled 3 games.
Bunuel. The question is very confusing. It says average score of all the games bowled. It doesn't specify that if it is asking the average score of bowlers or average score of a match in the tournament. I don't such language is actually used in actual GMAT. Actual GMAT questions are crystal clear.
To solve this question , I am considering that the average score of bowlers is being asked.
Given : each bowlers bowled equal no. of games in a tournament.
DS: average score of all games bowled in tournament.
Statement 1: 70 percent of the bowlers had an average (arithmetic mean) score of 120, and the other 30 percent had an average score of 140.
So average score of all bowlers = .7*120 + .3* 140 = 84 + 42 = 126
SUFFICIENT Statement 2: Each of the 350 bowlers in the tournament bowled 3 games.
So, here we know the number of bowlers and the games but we don't know about the total score. So we can't calculate the average score of the bowler.
NOT SUFFICIENTAnswer A