Rupees

Seventy coins of rs 10 and rs 50 are kept in a purse. Suppose the total value of the money in the purse is RS.1900. find the number of each type of coin.

Correct answer:

a =  40
b =  30

Step-by-step explanation:

a+b=70 10a+50b=1900  a+b=70 10 a+50 b=1900  a+b=70 10a+50b=1900  Pivot:Row1Row2 10a+50b=1900 a+b=70  Row2101 Row1Row2 10a+50b=1900 4b=120  b=4120=30 a=10190050b=10190050 30=40  a=40 b=30



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