Question
A bag contains 20 rupees note, 50 rupees note and 100
rupees note in the ratio 5:7:2. If the total amount in the bag is Rs 2,600, find the average number of 20 rupees note and 50 rupee note.Solution
Ratio of values of the notes = 5 ×20∶7×50∶2 ×100 = 2:7:4 Value of 20 rupees note = 2600×2/13= Rs. 400 Value of 50 rupees note = 2600×7/13= Rs. 1400 Value of 100 rupees note = 2600×4/13= Rs. 800 Number of 20 rupees note = 400/20 = 20 Number of 50 rupees note = 1400/50 = 28 Number of 100 rupees note = 800/100 = 8 Average of 50 & 20 rupee note = (20+28)/2 = 24
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