Chain Rule Practice Test 1 with solutions

Question : 37 of 40

Marks: +1, -0

The cost of 21 pencils and 9 clippers is Rs 819. The cost price of 7 pencils and 3 clippers is:

Solution:

Cost of 21 pencils and 9 clippers = Rs 819
Cost of 7 pencils and 3 clippers =

{819}/{3}

= Rs 273

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