When 100 rupees were converted into small change, 20 and 10 denomination notes were obtained. If there are a total of 7 notes, how many 20 denomination notes are there?

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100 രൂപ ചില്ലറ ആക്കിയപ്പോൾ 20 ന്റെയും 10 ന്റെയും നോട്ടുകളാണ് കിട്ടിയത്. ആകെ 7 നോട്ടുകൾ എങ്കിൽ 20 എത്ര നോട്ടുകൾ ഉണ്ട് ?

A4

B3

C2

D5

Answer:

B. 3

Read Explanation:

20 ന്റെ നോട്ടുകളുടെ എണ്ണം X ആയാൽ 20X + 10(7 - X) = 100 20X + 70 - 10X = 100 10X = 100 - 70 = 30 10X = 30 X = 30/10 = 3

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