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Algorithms Quiz | SP2 Contest 1 | Question 30

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The ratio of boys and girls in Sudo Placement Test-1 initially is 5:8. When 560 new girls joined the test, then the ratio become 5:15. How many boys participated in the Sudo Placement Test-1?

(A) 640
(B) 490
(C) 160
(D) 400


Answer: (D)

Explanation: => 5x / (8x+560) = 5 / 15
=> 75x / 5 = 8x + 560
=> 15x = 8x + 560
=> 7x = 560
=> x = 80
Therefore,
5*80 = 400
So, option (D) is correct.


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Last Updated : 28 Aug, 2018
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