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Due to an increase of 30% in the price of eggs, 3 eggs less are available for Rs. 7.80. The present rate of eggs per dozen is ?
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- Rs. 8.64
- Rs. 8.88
- Rs. 9.36
- None of these
Correct Option: C
Let the original rate be 'P' paise per egg.
Number of eggs bought for Rs. 7.80 = 780/P
New rate = (130% of P) paise per egg = 13P/10 paise per egg
Number of eggs bought for Rs. 7.80 = 780 x 10/13P = 600/P
∵ 780/P - 600/P = 3
⇒ 3P = 180
⇒ P = 60
So, present rate = (13 x 60)/10 paise per egg = 78 paise per egg
= Rs. 9.36 per dozen
