A tennis team has won 15 out of 20 matches they played this season. How many additional matches must the team win in a row to raise its winning percentage to 90%?
Answers
30 is the correct answer
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Solution :-
Let us assume that, the teams need x additional matches to win to raise its winning percentage to 90% .
so,
→ Total matches played = 20 matches .
→ Matches wins by team = 15 matches.
after x more matches wins ,
→ Total Matches wins by team = (15 + x) matches .
A/q,
→ (15 + x) is 90% of total matches played.
→ (15 + x) = 90% of 20
→ 15 + x = (90 * 20)/100
→ 15 + x = 9 * 2
→ 15 + x = 18
→ x = 18 - 15
→ x = 3 matches (Ans.)
Hence, the teams needs to win 3 additional matches in a row to raise its winning percentage to 90% .
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