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Q.

A student was asked to multiply a number by 5/4 but he divided that number by 5/4. His result was 45 less than the correct answer. The number was

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a

11

b

100

c

90

d

80

answer is A.

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Detailed Solution

Solution:   Let total number = x

  Each person contributed Rs. 2x

 The number is = x

5x4−4x5=45

⇒25x−16x20=45⇒9x=900

⇒x = 100

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