Question

18. In the Ruchika's wallet there are only Rs. 16, consisting of 10
paise, 20 paise and Re. 1 coins. The ratio of no. of coins of 10
paise and 20 paise is 6:1. The minimum no. of Re 1 coin is :
(a) 5
(b) 12
(d) 8
(c) 4​

Answer 1

Answer:

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Answer 2

Answer:

10x +20y + 100z = 1600

since ,

x:y =6:1

60y+20y+ 100Z = 1600

80y+100z = 1600

ie 4 y+ 5z = 80

now take z = 1'2'3'4 and check

you will get z = 4 coz

so minimum 4 , 1 Re coin will be there in the wallet