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In a school there were 1554 students and...

In a school there were 1554 students and the ratio of the number of the boys and girls was 4 : 3. After few days, 90 girls joined. the school but few boys left, as a result the ratio of the boys and girls became 13 : 12.The number of boys who left the school is-
एक विद्यालय में 1554 छात्र थे और लड़कों और लड़कियों की संख्या का अनुपात 4 : 3 था। कुछ दिनों बाद 90 लडकियों ने उस विद्यालय में प्रवेश लिया, कुछ लड़कों ने विद्यालय छोड़ दिया, परिणामस्वरूप लड़को और लड़कियो का अनुपात 13 : 12 हो गया। विद्यालय छोड़ने वाले लड़को की संख्या कितनी है?

A

86

B

69

C

80

D

76

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CHAMPION PUBLICATION-2015 TIER-II PAPER(17)-EXERCISE
  1. If (3x - 2y) : (2x + 3y) = 5 : 6 then the value of ((root(3)(x)+root(3...

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  2. The diameter of each wheel of a car is 70 cm. If each wheel rotates 40...

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  3. In a school there were 1554 students and the ratio of the number of th...

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  4. There would be a 10% loss, if rice is sold at F 54 per kg. To earn a p...

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  5. What part of a ditch 48 m long, 16.5 m broad and 4 m deep can be fille...

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  6. A sum of money is paid back in two annual instalments of Rs.17, 640 ea...

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  7. If 5 cos theta+12 sin theta=13, 0^@< theta <90^@, then the value of si...

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  8. If a hemisphere is melted and four spheres of equal volume are made, t...

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  9. If 90 men can do a certain job in 16 days, working 12 hours day, then ...

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  10. The perimeter of a rhombus is 60 cm and one of its diagonal is 24 cm. ...

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  11. If x - sqrt3 - sqrt2 = 0 and y - sqrt3 + sqrt2 =0, then the value of ...

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  12. Three glasses of equal volume contains acid mixed with water .The rati...

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  13. The H.C.F and L.C.M of two numbers are 21 and 84 respectively. If the ...

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  14. एक संख्या को जब 361 से विभाजित किया जाए तो शेषफल 47 रहता है । यदि उसी ...

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  15. There is a wooden sphere of radius 6 sqrt3 cm. The surface area of the...

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  16. 60 Kg of an alloy A is mixed with 100 kg of alloy B .If alloy A has le...

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  17. A telegraph post is bent at a point above the ground due to storm. Its...

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  18. The radii of two solid iron sphere are 1 cm and 6 cm respectively. A h...

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  19. The average age of 30 students of a class is 14 years 4 months. After ...

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  20. The value of cot41^(@).cot42^(@).cot43^(@).cot44^(@).cot45^(@).cot46...

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