Raj and aditi like to play chess against each other. aditi has won 12 of the 20 games so far. they decide to play more games. how many more games will aditi have to win to have a 70% winning record?

Question

Mathematics

Guest

12 March, 00:11

Raj and aditi like to play chess against each other. aditi has won 12 of the 20 games so far. they decide to play more games. how many more games will aditi have to win to have a 70% winning record?

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Answers (2)

Know the Answer?

Baby Boo · Answer 1

The correct answers are 12+x = 0.80 (x+20) and 20

Marc Potts · Answer 2

For this item, we let x be the number of games that Aditi will have to win in order to have a 70% winning record. Since, he already have 12 out of 20 games, the equation that will guarantee him the winning record is,

(12+x) : (20 + x) = 0.7

The value of x from the equation above is 6.67. Since, we cannot express the number of games in a fraction, the answer would then be 7.