Last year mangoes were available at ₹ 60 per dozen. This year the same variety of mangoes is available for ₹ 120 per score. Find the percentage increase or decrease in the price of mangoes. ( 1 score = 20)
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cost of 12 bananas last year = Rs. 60
cost of 1 banana last year = 60 / 12 = Rs 5
cost of 20 bananas this year = Rs . 120
cost of 1 banana this year = 120 / 20 = Rs.6
increase = Rs 1
% = 1/5 x 100 = 20%
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