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Q. Four persons, A, B, C and D have a total of Rs. 100 among themselves. A has only Rs. 5 coins and B, C and D have only Rs. 2 coins. A and B together have 60% of the total money. If the total number of coins are 41, how much money does A has?

Q. चार व्यक्तियों A, B, C और D के पास कुल मिलाकर 100 रु. की एक धनराशि है। A के पास केवल 5 रु. के सिक्के हैं और B, C और D के पास केवल 2 रु. के सिक्के हैं। A और B की धनराशि का योग कुल धनराशि का 60% है। यदि कुल सिक्कों की संख्या 41 है, तो A के पास कितना धन है?

A
Rs. 20

20 रु.
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B
Rs. 25

25 रु.
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C
Rs. 30

30 रु.
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D
Rs. 35

35 रु.
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Solution

The correct option is C Rs. 30

30 रु.

It is given that A and B together have 60% of the total money, so the C and D will have Rs. 40
C and D have Rs. 40 from Rs. 2 coins.
Therefore, number of coins with them i.e. C and D = 40/2 = 20 coins.
Hence, number of coins with A and B = 41-20 = 21 coins.
Now, Amount of money with A + Amount of money with B = 60
If A has x coins, then 5 × x + 2(21 – x) = 60
Or 5x – 2x + 42 = 60
Or 3x = 18
Or x = 6
Thus, the total amount of money with A = 6 × 5 = Rs. 30.
Hence, option (c) is the correct answer.

C और D के पास 2 रु. के सिक्कों से 40 रु. हैं।
इसलिए, उनके पास सिक्कों के संख्या = 402 = 20 सिक्के।
इस प्रकार, A और B के पास सिक्कों की संख्या = 41 – 20 = 21 सिक्के।
अब, A के पास की धनराशि + B के पास की धनराशि = 60
यदि A के x सिक्के हैं, तब x × 5 + (21 – x) × 2 = 60
या 5x – 2x + 42 = 60
या 3x = 18
या x = 6
इस प्रकार, A के पास कुल धनराशि = 6 × 5 = 30 रु.।


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