math

1. When 100 students took a test, the average score was 77,1. Two more students took the test, the sum of the score was 125. What is the new average ?

2. The Basket Ball Team and Baseball team have a total of 24 players. There are 12 basket players and 18 baseball players. How may players are on both the basketball and baseball team ?

Confuse..

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  1. So the total score for all 100 students is 7710
    Two more students added 125 for a new total of 7835

    new average = 7835/102 = 76.8

    2. total = 12 bb-players + 18 baseball players
    = 30 players

    but there were only 24 , so 6 must have been playing both sports.

    check: 12+18-6 = 24

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