Suppose that after 20 at-bats a baseball player has a batting average of 0.400. If the baseball player gets a hit at the next at-bat, what will the player's new batting average be? (The batting average is the number of hits divided by the number of at-bats.)
A)0.381
B)0.333
C)0.400
D)0.429

Question

Quizplus · Accepted Answer

After 20 at-bats with a batting average of 0.400, the player has 8 hits (20 * 0.400). After getting a hit in the next at-bat, the player has 9 hits in 21 at-bats, making the new batting average 9/21 = 0.42857, which rounds to 0.429.

Suppose That After 20 At-Bats a Baseball Player Has a Batting