Question

4. Kate has some notes of denominations 20 and 50. The number of 20 notes is twice the
number of 50 notes. If the amount with her is 300 more than five times the number of notes, find
the number of notes of each denomination with her.
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Answer 1

Answer:

no. of notes of Rs. 50 = 4  

no. of 20 rupees notes = 8

Step-by-step explanation:

no. of notes of Rs. 50 = x  

Amount of notes of Rs. 50 = 50x  

no. of 20 rupees notes = 2x

Amount of notes of Rs. 20 = 40x  

Total no. of notes = 2x+x=3x

Equation

Amount with her is Rs 300 more than five times the number of notes,

50x + 40x = 300 + 5 * 3x

75x = 300

x = 4

no. of notes of Rs. 50 = x = 4  

no. of 20 rupees notes = 2x  = 8