Question

Select the correct answer.

A basketball team played 15 games and won 80% of them. If the team expects to play 30 games in all, how many more games must it win to finish the season with a 90% winning percentage?
A.
12
B.
14
C.
15
D.
27

Answer 1

C. 15

Explanation:

The team has won ...

0.80 × 15 = 12 . . . games

To finish the season with a 90% winning percentage, they must win a total of ...

0.90 × 30 = 27 . . . games

That is, they must win ...

27 -12 = 15 . . . more games

The team must win 15 more games to finish with a 90% win rate.

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Additional comment

That means they must win every game of the last 15 played.