Question 159
Ashish has Rs. 10 notes and Rs.20 notes only. If the number of Rs. 20 notes is twice the number of Rs. 10 notes and the total amount he has is Rs. 3,250, what is the total number of notes that he has?
Solution
Let the number of Rs. 10 notes = $$x$$
=> No. of Rs. 20 notes = $$2x$$
=> Amount of Rs. 10 notes = Rs. $$10x$$
Amount of Rs. 20 notes = Rs. $$40x$$
Acc. to ques,
=> $$10x + 40x = 3250$$
=> $$x = \frac{3250}{50} = 65$$
$$\therefore$$ Total number of notes that he has = $$x + 2x$$
= $$3x = 3 \times 65 = 195$$
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